Arizona climate
World Climates covers 5 places in Arizona. By annual mean temperature, the warmest is Yuma (23 °C74 °F) and the coolest is Tucson (21 °C70 °F). The wettest is Tucson with 324 mm13 in of precipitation per year, the driest Yuma with 99 mm3.9 in.
The most common climate types (Köppen classification computed from these averages) are hot desert (BWh, 4 places) and hot semi-arid (BSh, 1 place).
The highest monthly average high is in Phoenix (42 °C107 °F in July); the lowest monthly average low is in Tucson (4 °C39 °F in December).
Across the places in Arizona, the months that most often rank as the most comfortable are February, March and November (5, 5 and 5 of 5 places respectively).
Frequently asked questions
Which is the warmest place in Arizona?
By annual mean temperature, the warmest place in Arizona is Yuma at 23 °C74 °F. The coolest is Tucson at 21 °C70 °F.
Where does it rain the most in Arizona?
Tucson gets the most precipitation, 324 mm13 in in an average year. The driest place is Yuma with 99 mm3.9 in.
How many places in Arizona does this site cover?
World Climates has climate data for 5 places in Arizona. Each one has a page with monthly averages for temperature, rainfall, humidity and daylight.
When is the best time to visit Arizona?
It depends on the place. Across Arizona, the months that most often rank as the most comfortable are February, March and November. Check the page of each city for its own best months.
Climate of every place in Arizona
| Place | Year | Max high | Min low | Precip. |
|---|---|---|---|---|
| Phoenix | 23 | 42 | 5 | 256 |
| Tucson | 21 | 39 | 4 | 324 |
| Mesa | 23 | 42 | 5 | 256 |
| Peoria | 23 | 42 | 5 | 193 |
| Yuma | 23 | 42 | 6 | 99 |
Year = annual mean temperature; max high = average high of the warmest month; min low = average low of the coldest month; precip. = annual total. Temperatures in °C°F, precipitation in mminches. Sorted by population.
Other cities over 100,000 people
These cities share a NASA POWER grid cell with a larger place, so their averages are shown on that page:
- Chandler → data of Mesa
- Gilbert → data of Mesa
- Glendale → data of Phoenix
- Scottsdale → data of Mesa
- Tempe → data of Mesa
- Tempe Junction → data of Mesa
- Surprise → data of Peoria
Data: NASA POWER climatology 2001–2025 (MERRA-2 reanalysis, CERES satellite data) — grid-cell averages, not station records. Sources and method.