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Solar Panels in Arizona: Permits, Licensing and Extreme Heat

Solar work in Arizona sits at the meeting point of three things: a city permit rule, a contractor license class, and some of the hottest summer weather in the country. The permit answer changes by city, and only one city's answer is confirmed here. This page covers permits, license classes, county heat and how to check an installer. It does not cover pricing or incentives.

Updated Oct 22, 2026

Solar permits: what one city has said so far

Mesa is the one city whose solar answer is confirmed on this page. Its residential FAQ says: "Yes, solar power systems under 10,000 square feet that are certified by a recognized agency and installed by a licensed Arizona contractor no not need a construction permit. However, new electric meters or circuits will require a permit."^[15]

Rooftop solar panels on a single-story home — A rooftop solar array on a single-story home

In Mesa, the answer depends. A certified system under 10,000 square feet installed by a licensed Arizona contractor needs no construction permit, but a new meter or new circuit does.

Decide

Does a Mesa solar job need a construction permit?

Is it a certified system under 10,000 square feet, installed by a licensed Arizona contractor?

If Yes, and no new meter or circuit
then: No construction permit needed
If Yes, but it adds a new meter or circuit
then: A permit is required

Check the city's fee schedule for the fee.^[15]

Every other city is a "check with the city" answer. Coconino County's solar permit materials, for example, call for a site plan, a one-line electrical diagram and a roof plan. The county also says roof framing requires structural review.^[17]

Start with the solar permit rules by city page, which links each city's own permit page. Or go straight to your city's page for the department link.

Which license classes cover solar work

Arizona's Administrative Code names six Registrar of Contractors (ROC) classes with "solar" in the title. Each is a plumbing, air conditioning or pool license that includes solar within its own scope.^[13]^[14]

Class	Name	Scope in the code's words
R-39	Air Conditioning and Refrigeration, Including Solar	Comfort air conditioning, "with or without solar equipment"; excludes a new service panel or sub-panel^[13]
CR-79	Air Conditioning and Refrigeration Including Solar (dual)	The scopes of the commercial C-79 and residential R-39 licenses^[14]
R-37	Plumbing, Including Solar	Water and gas piping, fixtures, vents and devices, "as well as solar applications"^[13]
CR-77	Plumbing Including Solar (dual)	The scopes of the commercial C-77 and residential R-37 licenses^[14]
B-6	General Swimming Pool Contractor, Including Solar	The B-5 scope plus "installation and repair of solar heating devices"^[13]
KA-6	Dual Swimming Pool Contractor, Including Solar	The scopes of the commercial A-19 and residential B-6 licenses^[14]

Read the scope column closely.

The R-39 text excludes installing a new service panel, which is a boundary worth raising with any installer. The full list of classes is on the contractor license classes page.

Extreme heat and solar panels

Heat varies sharply across the state. These are NOAA 1991-2020 normals at one station per county, so they describe that station, not the whole county.

County (station)	July high	Days at or above 100 F
La Paz (Parker)	108.4 F^[3]	126.3^[4]
Yuma (Yuma Mcas)	106.7 F^[11]	118.2^[12]
Pinal (Casa Grande Nm)	106.6 F^[9]	115.6^[10]
Maricopa (Phoenix Sky Harbor)	106.5 F^[5]	111.3^[6]
Pima (Tucson International)	100.2 F^[7]	67.9^[8]
Coconino (Flagstaff Pulliam)	82.0 F^[1]	0.0^[2]

The station for Maricopa County averages 111.3 days a year at or above 100 F, while the one for Coconino County averages none. The other nine counties are on the county heat data page.

111.3

days a year at or above 100 F at the Maricopa County station

No numbered source on this page states how heat changes panel output or lifespan, so no such figure appears here.

For that question, read how Arizona heat affects solar output.

How to check a solar installer's license

The ROC runs its own contractor search at azroc.my.site.com/AZRoc/s/contractor-search.^[16]

Use it before you sign anything.

Get the installer's business name and license number from the written proposal.
Run the search at the link above.
Compare the license class with the work proposed, using the table in the license section.
Ask the installer who pulls the permit, or whether the city's rule means none is needed.

For a longer walkthrough, see how to check a contractor license.

Ask the installer to put the license number on the contract so you can match it to the search.

Quick answers

Does a solar system in Mesa need a construction permit?

Not if it is certified, under 10,000 square feet and installed by a licensed Arizona contractor. A new meter or new circuit does need a permit.

Where can I check an installer's license?

Use the ROC contractor search, then compare the license class with the work proposed.

Sources

NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Flagstaff Pulliam Airport (monthly normals)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00003103&dataset=normals-monthly-1991-2020&dataTypes=MLY-TMAX-NORMAL,MLY-PRCP-NORMAL. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Flagstaff Pulliam Airport (annual days at or above 100 F)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00003103&dataset=normals-annualseasonal-1991-2020&dataTypes=ANN-TMAX-AVGNDS-GRTH100. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Parker (monthly normals)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USC00026250&dataset=normals-monthly-1991-2020&dataTypes=MLY-TMAX-NORMAL,MLY-PRCP-NORMAL. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Parker (annual days at or above 100 F)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USC00026250&dataset=normals-annualseasonal-1991-2020&dataTypes=ANN-TMAX-AVGNDS-GRTH100. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Phoenix Sky Harbor International Airport (monthly normals)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00023183&dataset=normals-monthly-1991-2020&dataTypes=MLY-TMAX-NORMAL,MLY-PRCP-NORMAL. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Phoenix Sky Harbor International Airport (annual days at or above 100 F)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00023183&dataset=normals-annualseasonal-1991-2020&dataTypes=ANN-TMAX-AVGNDS-GRTH100. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Tucson International Airport (monthly normals)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00023160&dataset=normals-monthly-1991-2020&dataTypes=MLY-TMAX-NORMAL,MLY-PRCP-NORMAL. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Tucson International Airport (annual days at or above 100 F)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00023160&dataset=normals-annualseasonal-1991-2020&dataTypes=ANN-TMAX-AVGNDS-GRTH100. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Casa Grande Nm (monthly normals)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USC00021314&dataset=normals-monthly-1991-2020&dataTypes=MLY-TMAX-NORMAL,MLY-PRCP-NORMAL. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Casa Grande Nm (annual days at or above 100 F)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USC00021314&dataset=normals-annualseasonal-1991-2020&dataTypes=ANN-TMAX-AVGNDS-GRTH100. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Yuma Mcas (monthly normals)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00003145&dataset=normals-monthly-1991-2020&dataTypes=MLY-TMAX-NORMAL,MLY-PRCP-NORMAL. Accessed October 21, 2026.
NOAA National Centers for Environmental Information. "NOAA 1991-2020 Climate Normals, Yuma Mcas (annual days at or above 100 F)." https://www.ncei.noaa.gov/access/services/data/v1?includeStationName=1&format=csv&stations=USW00003145&dataset=normals-annualseasonal-1991-2020&dataTypes=ANN-TMAX-AVGNDS-GRTH100. Accessed October 21, 2026.
Cornell Legal Information Institute. "Arizona Administrative Code R4-9-103 (contractor classifications)." https://www.law.cornell.edu/regulations/arizona/Ariz-Admin-Code-SS-R4-9-103. Accessed October 21, 2026.
Cornell Legal Information Institute. "Arizona Administrative Code R4-9-104 (contractor classifications)." https://www.law.cornell.edu/regulations/arizona/Ariz-Admin-Code-SS-R4-9-104. Accessed October 21, 2026.
City of Mesa. "Mesa: solar panel installation permit." https://www.mesaaz.gov/Business-Development/Development-Services/Building-Permit-Plan-Review/Residential-Construction/Residential-Construction-FAQ. Accessed October 21, 2026.
Arizona Registrar of Contractors. "Arizona ROC contractor search." https://azroc.my.site.com/AZRoc/s/contractor-search. Accessed October 21, 2026.
Coconino County. "Residential Solar and Wind Permit FAQs." https://www.coconino.az.gov/DocumentCenter/View/1511/Solar-and-Wind-Permitting-FAQs?bidId=. Accessed October 21, 2026.

Solar permit rules, city by city

Permit rules for Solar
City	Job	Permit?	Checked
Phoenix metroCovered by our 602 directories
	Solar	Check with the city	Oct 21, 2026
Avondale, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Avondale · checked Oct 21, 2026 No directory of ours in Avondale for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Buckeye, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Buckeye · checked Oct 21, 2026 No directory of ours in Buckeye for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Chandler, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Chandler · checked Oct 21, 2026 No directory of ours in Chandler for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Gilbert, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source Town of Gilbert · checked Oct 21, 2026 No directory of ours in Gilbert for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Glendale, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Glendale · checked Oct 21, 2026 No directory of ours in Glendale for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Goodyear, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Goodyear · checked Oct 21, 2026 No directory of ours in Goodyear for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Maricopa, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Maricopa · checked Oct 21, 2026 No directory of ours in Maricopa for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Depends	Oct 21, 2026
Mesa, solar Solar systems under 10,000 square feet that are certified and installed by a licensed Arizona contractor need no construction permit, but new electric meters or circuits do require one. What the city's page says Are there rules for solar power systems? Yes, solar power systems under 10,000 square feet that are certified by a recognized agency and installed by a licensed Arizona contractor no not need a construction permit. However, new electric meters or circuits will require a permit. Source City of Mesa · checked Oct 21, 2026 No directory of ours in Mesa for this job The license to ask for Mesa's own page Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Peoria, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Peoria · checked Oct 21, 2026 No directory of ours in Peoria for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Phoenix, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Phoenix · checked Oct 21, 2026 No directory of ours in Phoenix for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Queen Creek, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source Town of Queen Creek · checked Oct 21, 2026 No directory of ours in Queen Creek for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
San Tan Valley, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source Pinal County · checked Oct 21, 2026 No directory of ours in San Tan Valley for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Scottsdale, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Scottsdale · checked Oct 21, 2026 No directory of ours in Scottsdale for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Surprise, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Surprise · checked Oct 21, 2026 No directory of ours in Surprise for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Tempe, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Tempe · checked Oct 21, 2026 No directory of ours in Tempe for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
Southern ArizonaThe hire-it-yourself kit
	Solar	Check with the city	Oct 21, 2026
Tucson, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Tucson · checked Oct 21, 2026 No directory of ours in Tucson for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
Northern ArizonaThe hire-it-yourself kit
	Solar	Check with the city	Oct 21, 2026
Flagstaff, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Flagstaff · checked Oct 21, 2026 No directory of ours in Flagstaff for this job The license to ask for Flagstaff's own page Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Prescott, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Prescott · checked Oct 21, 2026 No directory of ours in Prescott for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
Western ArizonaThe hire-it-yourself kit
	Solar	Check with the city	Oct 21, 2026
Lake Havasu City, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Lake Havasu City · checked Oct 21, 2026 No directory of ours in Lake Havasu City for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.
	Solar	Check with the city	Oct 21, 2026
Yuma, solar We could not confirm this city's rule from its own pages. Check with the city before the work starts. Source City of Yuma · checked Oct 21, 2026 No directory of ours in Yuma for this job The license to ask for Ask who pulls the permit and whether the fee is in the quote.

Permit neededDependsNo permitCheck with the city1 of 20 rows confirmed from the city's own pages

County heat and monsoon figures

County

July normal high

Days ≥ 100°F

Jul–Sep rain

Station (our choice)

NWS PhoenixThe forecast office that covers these counties

96.8°F

31.2

5.8 in

Globe #3

Gila County, month by month

55.3Jan

59.4Feb

67.7Mar

76.1Apr

85.2May

96.5Jun

96.8Jul

95.3Aug

90.1Sep

79.2Oct

65.2Nov

55.9Dec

Normal high, °FRain, in. (scale shared by every county)

Gila County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	55.3	59.4	67.7	76.1	85.2	96.5	96.8	95.3	90.1	79.2	65.2	55.9
Low °F	32.9	36.3	40.9	47.4	54.7	64.5	70.6	68.9	63.1	51.8	41	32.7
Rain in.	2.05	1.9	1.04	0.44	0.35	0.26	2.71	2.08	1.01	1.22	1.05	1.51

Station: Globe #3 · USC00023501Our choice of station: 0 miles from Globe, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 2009-2026, 18 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

108.4°F

126.3

1.02 in

Parker

La Paz County, month by month

68.7Jan

72.7Feb

79.9Mar

86.5Apr

95.5May

105.3Jun

108.4Jul

107.6Aug

103.1Sep

90.3Oct

77.6Nov

66.7Dec

Normal high, °FRain, in. (scale shared by every county)

La Paz County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	68.7	72.7	79.9	86.5	95.5	105.3	108.4	107.6	103.1	90.3	77.6	66.7
Low °F	41.5	45	49.9	56.4	64.4	73.7	80.7	81.2	73.8	60.9	49.2	40.4
Rain in.	0.85	0.73	0.55	0.16	0.07	0.03	0.18	0.43	0.41	0.42	0.23	0.51

Station: Parker · USC00026250Our choice of station: 0 miles from Parker, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1893-2024, 132 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

106.5°F

111.3

2.41 in

Phoenix Sky Harbor Intl. Airport

Maricopa County, month by month

67.6Jan

70.8Feb

78.1Mar

85.5Apr

94.5May

104.2Jun

106.5Jul

105.1Aug

100.4Sep

89.2Oct

76.5Nov

66.2Dec

Normal high, °FRain, in. (scale shared by every county)

Maricopa County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	67.6	70.8	78.1	85.5	94.5	104.2	106.5	105.1	100.4	89.2	76.5	66.2
Low °F	46	49	54.5	60.8	69.5	78.6	84.5	83.6	78.1	65.6	53.7	45.3
Rain in.	0.87	0.87	0.83	0.22	0.13	0.02	0.91	0.93	0.57	0.56	0.57	0.74

Station: Phoenix Sky Harbor Intl. Airport · USW00023183Our choice of station: 4 miles from Phoenix, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1933-2026, 94 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

106.6°F

115.6

3.06 in

Casa Grande NM

Pinal County, month by month

67.6Jan

71.3Feb

78.2Mar

86.4Apr

95.2May

105.1Jun

106.6Jul

104.9Aug

100.7Sep

90.5Oct

77.8Nov

66.9Dec

Normal high, °FRain, in. (scale shared by every county)

Pinal County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	67.6	71.3	78.2	86.4	95.2	105.1	106.6	104.9	100.7	90.5	77.8	66.9
Low °F	37	39.7	45.2	50.8	59.2	68	77.1	76.6	69.8	56.3	43.7	36.3
Rain in.	0.98	1.02	0.94	0.25	0.2	0.06	1.12	1.24	0.7	0.48	0.49	0.77

Station: Casa Grande NM · USC00021314Our choice of station: 9 miles from Florence, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1908-2026, 119 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

106.7°F

118.2

1.12 in

Yuma MCAS

Yuma County, month by month

69.8Jan

73.4Feb

80.2Mar

86.4Apr

94.3May

103.3Jun

106.7Jul

106.4Aug

101.4Sep

90.2Oct

77.7Nov

67.8Dec

Normal high, °FRain, in. (scale shared by every county)

Yuma County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	69.8	73.4	80.2	86.4	94.3	103.3	106.7	106.4	101.4	90.2	77.7	67.8
Low °F	47.9	50.4	55	59.8	66.9	75	82.6	83.2	77.6	65.7	54.4	46.8
Rain in.	0.39	0.38	0.39	0.14	0.06	0.01	0.24	0.2	0.68	0.13	0.23	0.43

Station: Yuma MCAS · USW00003145Our choice of station: 5 miles from Yuma, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1982-2026, 45 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

NWS TucsonThe forecast office that covers these counties

87.4°F

0.3

10.04 in

Bisbee 1WNW

Cochise County, month by month

55.8Jan

59.7Feb

66.9Mar

73.4Apr

80.9May

89.3Jun

87.4Jul

84.8Aug

81.6Sep

74.9Oct

64Nov

56.2Dec

Normal high, °FRain, in. (scale shared by every county)

Cochise County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	55.8	59.7	66.9	73.4	80.9	89.3	87.4	84.8	81.6	74.9	64	56.2
Low °F	32.2	34.7	38.2	44	51.2	60.1	63.2	61.1	56.5	47.7	38.8	32.6
Rain in.	1.31	1.14	0.88	0.19	0.28	0.48	3.81	4.25	1.98	0.98	0.74	1.07

Station: Bisbee 1WNW · USC00020775Our choice of station: 0 miles from Bisbee, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1985-2021, 37 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

99°F

45.6

4.27 in

Safford Ag. Center

Graham County, month by month

62Jan

66.8Feb

74.3Mar

82.5Apr

91.4May

100Jun

99Jul

96.9Aug

93.2Sep

84.4Oct

71.7Nov

61.1Dec

Normal high, °FRain, in. (scale shared by every county)

Graham County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	62	66.8	74.3	82.5	91.4	100	99	96.9	93.2	84.4	71.7	61.1
Low °F	30.3	33.9	39.3	45.5	53.6	62.6	69.4	68	61	48.3	37.4	30.2
Rain in.	0.71	0.66	0.45	0.21	0.18	0.27	1.35	1.84	1.08	0.75	0.51	0.77

Station: Safford Ag. Center · USC00027390Our choice of station: 2 miles from Safford, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1948-2026, 79 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

97.5°F

40.2

5.07 in

Duncan

Greenlee County, month by month

60.2Jan

64.9Feb

72.5Mar

80.5Apr

88.9May

98.1Jun

97.5Jul

95.5Aug

90.7Sep

81.4Oct

69.3Nov

59.2Dec

Normal high, °FRain, in. (scale shared by every county)

Greenlee County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	60.2	64.9	72.5	80.5	88.9	98.1	97.5	95.5	90.7	81.4	69.3	59.2
Low °F	25.1	28.5	33.1	38.6	47.1	57.2	65.5	64.6	56.4	42.8	30.8	24.9
Rain in.	0.94	0.84	0.5	0.17	0.29	0.25	1.68	2.18	1.21	0.71	0.64	1

Station: Duncan · USC00022754Our choice of station: 23 miles from Clifton, no active normals station within 10 miles of the county seat, so searched within 40 miles; longest active temperature record in that range (GHCN-Daily TMAX 1901-2026, 126 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

100.2°F

67.9

5.51 in

Tucson Intl. Airport

Pima County, month by month

66.5Jan

69.2Feb

75.8Mar

82.9Apr

91.8May

101.2Jun

100.2Jul

98.6Aug

95.1Sep

86.3Oct

75.1Nov

65.5Dec

Normal high, °FRain, in. (scale shared by every county)

Pima County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	66.5	69.2	75.8	82.9	91.8	101.2	100.2	98.6	95.1	86.3	75.1	65.5
Low °F	40.8	43.2	48	53.3	61.8	71.1	76.3	75.2	70.4	59	47.9	40.5
Rain in.	0.84	0.84	0.56	0.24	0.2	0.23	2.21	1.98	1.32	0.67	0.56	0.96

Station: Tucson Intl. Airport · USW00023160Our choice of station: 6 miles from Tucson, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1946-2026, 81 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

94.4°F

22.3

9.73 in

Nogales 6 N

Santa Cruz County, month by month

65.3Jan

67.2Feb

72.8Mar

79.4Apr

87.4May

96.5Jun

94.4Jul

92.3Aug

90.5Sep

83.5Oct

73.4Nov

64.6Dec

Normal high, °FRain, in. (scale shared by every county)

Santa Cruz County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	65.3	67.2	72.8	79.4	87.4	96.5	94.4	92.3	90.5	83.5	73.4	64.6
Low °F	28.3	30.5	35	39.5	46.3	56.3	65.3	64	57.5	44.6	34.4	28
Rain in.	0.98	0.92	0.69	0.35	0.17	0.68	3.59	3.91	2.23	0.85	0.59	1.14

Station: Nogales 6 N · USC00025924Our choice of station: 8 miles from Nogales, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1952-2026, 75 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

NWS FlagstaffThe forecast office that covers these counties

91.1°F

1.2

5.02 in

Saint Johns

Apache County, month by month

49.6Jan

55.8Feb

63.6Mar

70.8Apr

79.8May

90Jun

91.1Jul

88Aug

83.1Sep

72.5Oct

60Nov

49.3Dec

Normal high, °FRain, in. (scale shared by every county)

Apache County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	49.6	55.8	63.6	70.8	79.8	90	91.1	88	83.1	72.5	60	49.3
Low °F	20.6	23.9	28.9	35.3	44	52.4	59.5	57.6	50.5	38.2	27.4	19.8
Rain in.	0.58	0.56	0.28	0.27	0.39	0.19	1.94	1.95	1.13	0.86	0.55	0.66

Station: Saint Johns · USC00027435Our choice of station: 3 miles from St. Johns, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1901-2026, 126 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

82°F

7.49 in

Flagstaff Pulliam Airport

Coconino County, month by month

43.4Jan

45.7Feb

52.2Mar

59.2Apr

68.1May

79.1Jun

82Jul

79.3Aug

74.1Sep

63.6Oct

52.1Nov

43Dec

Normal high, °FRain, in. (scale shared by every county)

Coconino County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	43.4	45.7	52.2	59.2	68.1	79.1	82	79.3	74.1	63.6	52.1	43
Low °F	17.6	19.6	23.8	28.2	34.6	42.5	51.4	50.6	42.5	31.5	23	16.9
Rain in.	2.05	2.17	1.88	0.89	0.77	0.3	2.61	3.04	1.84	1.52	1.55	1.9

Station: Flagstaff Pulliam Airport · USW00003103Our choice of station: 4 miles from Flagstaff, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1893-2026, 134 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

94.6°F

12.3

2.92 in

Winslow Muni. Airport

Navajo County, month by month

49.8Jan

56.2Feb

64.5Mar

71.9Apr

81.2May

92.3Jun

94.6Jul

91.7Aug

85.6Sep

73.8Oct

60.3Nov

48.7Dec

Normal high, °FRain, in. (scale shared by every county)

Navajo County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	49.8	56.2	64.5	71.9	81.2	92.3	94.6	91.7	85.6	73.8	60.3	48.7
Low °F	22	25.9	31.8	37.9	46.2	55.2	63.7	62.5	53.8	40.4	28.9	21.7
Rain in.	0.51	0.42	0.49	0.25	0.3	0.14	0.89	1.16	0.87	0.51	0.48	0.5

Station: Winslow Muni. Airport · USW00023194Our choice of station: 34 miles from Holbrook, no active normals station within 10 miles of the county seat, so searched within 40 miles; longest active temperature record in that range (GHCN-Daily TMAX 1898-2026, 129 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

89.6°F

1.2

7.11 in

Prescott

Yavapai County, month by month

52.6Jan

55.2Feb

61.2Mar

67.8Apr

76.3May

87Jun

89.6Jul

87.2Aug

82.4Sep

72.9Oct

61.6Nov

51.9Dec

Normal high, °FRain, in. (scale shared by every county)

Yavapai County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	52.6	55.2	61.2	67.8	76.3	87	89.6	87.2	82.4	72.9	61.6	51.9
Low °F	23.8	26.4	31.6	37.3	45	53.6	61	59.7	52.2	40.1	29.8	23.6
Rain in.	1.52	1.78	1.46	0.57	0.51	0.23	2.69	2.78	1.64	0.96	0.87	1.45

Station: Prescott · USC00026796Our choice of station: 3 miles from Prescott, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1898-2026, 129 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

NWS Las VegasThe forecast office that covers these counties

98.7°F

32.4

2.7 in

Kingman Mohave Co. Airport

Mohave County, month by month

57.4Jan

60.6Feb

67.4Mar

74.8Apr

84.9May

95.1Jun

98.7Jul

97.2Aug

90.9Sep

78.9Oct

66.1Nov

55.7Dec

Normal high, °FRain, in. (scale shared by every county)

Mohave County monthly normals
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
High °F	57.4	60.6	67.4	74.8	84.9	95.1	98.7	97.2	90.9	78.9	66.1	55.7
Low °F	30.9	33.3	38.1	43.4	52.7	62.3	70	68.9	60.4	48.3	36.5	30.2
Rain in.	0.98	1.04	0.59	0.46	0.08	0.11	0.86	0.88	0.96	0.74	0.62	0.68

Station: Kingman Mohave Co. Airport · USW00093167Our choice of station: 8 miles from Kingman, within 10 miles of the county seat; longest active temperature record in that range (GHCN-Daily TMAX 1996-2026, 31 years).
Source: NOAA NCEI 1991–2020 normals · checked Oct 21, 2026

Solar: where we can send you

Anywhere in Arizona

Hire it yourself

We have no solar directory, so this is the way to hire on your own.

1License: the license guide says which class to ask for.
2Permit: find your city's row in the permit table.
3Questions to ask before you sign:

Can I see your certificate of insurance, and who is named on it?
Who pulls the permit, and will the permit be in your name or mine?
Is the scope, the materials and the price in a written contract before work starts?
What is the warranty on the work, and who do I call under it?
Can you give me two recent jobs like mine that I can look at?

Solar permits: what one city has said so far

Which license classes cover solar work

Extreme heat and solar panels

How to check a solar installer's license

Solar permit rules, city by city

County heat and monsoon figures

Solar: where we can send you

Hire it yourself

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