Arizona has an average annual temperature of
70.2°F
(across all 25 cities) with approximately
277 mm of annual precipitation
and average humidity of 36%.
The warmest city is Yuma
with average July highs of 116.8°F,
while Flagstaff
is the coldest with average January lows of 9.7°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Jul is typically the warmest month across Arizona with average highs around
111.9°F, while
Jan is the coldest with average lows near
27.9°F.
Aug is the wettest month with approximately
43 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
75°F
27.9°F
51.4°F
31
49%
2.1
3.40
Feb
79°F
30.2°F
54.7°F
31
46%
2.1
4.30
Mar
86°F
34.5°F
60.3°F
28
41%
2.2
5.70
Apr
94.8°F
40.6°F
67.6°F
9
32%
2.4
7.20
May
102.2°F
48.9°F
75.6°F
6
25%
2.4
8.00
Jun
110.3°F
60.1°F
85.3°F
3
19%
2.4
8.30
Jul
111.9°F
70°F
91°F
37
32%
2.1
7.40
Aug
109.4°F
69.6°F
89.6°F
43
38%
1.9
6.80
Sep
105.1°F
59.4°F
82.2°F
27
35%
2.0
6.00
Oct
96.6°F
45.9°F
71.2°F
19
34%
2.0
4.90
Nov
85.1°F
34.7°F
59.9°F
21
38%
2.1
3.80
Dec
75.2°F
28.2°F
51.8°F
31
48%
2.0
3.10
📈 Arizona Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 Arizona Long-Term Climate Trends (1981–2025)
This chart shows how Arizona's average temperatures have shifted across 45 years.
Use the range buttons to focus on recent decades or view the full historical record.
Data is averaged across all 25 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in Arizona
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in Arizona.
Flagstaff is the wettest city in Arizona with approximately 463 mm of annual precipitation on average. View Flagstaff weather history →
What is the warmest month in Arizona?▼
Jul is the warmest month across Arizona, with state-wide average highs of 111.9°F and average lows of 70°F.
How many cities in Arizona have weather data?▼
TownPillar has historical weather data for 25 cities in Arizona, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in Arizona?▼
Jun is the sunniest month across Arizona with an average solar radiation of 8.30 kWh/m²/day state-wide. This solar radiation data from NASA POWER is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources). Data covers 45 years (1981–2025) across 25 cities in Arizona at monthly temporal resolution.