Climate of Arizona, USA
Area-weighted average across Arizona. For where people actually live and travel, see the cities below.
Arizona, a subdivision of United States of America, has a seasonal climate on average. Area-weighted monthly temperatures across the whole territory range from 5.3°C / 41.5°F in January to 26.6°C / 79.9°F in July, with rainfall from 7 mm / 0.3 in to 51 mm / 2 in depending on the season (323 mm / 12.7 in total across the year). See the 4 cities listed below for point-value climate at specific locations — these often differ from the area-weighted average, especially in geographically diverse subdivisions.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 5.3°C41.5°F | 28 mm1.1″ | — |
| February | 7.5°C45.5°F | 26 mm1″ | — |
| March | 10°C50°F | 30 mm1.2″ | — |
| April | 13.7°C56.7°F | 13 mm0.5″ | — |
| May | 18.4°C65.1°F | 9 mm0.4″ | Sunny & Mild |
| June | 23.6°C74.5°F | 7 mm0.3″ | Sunny & Warm |
| July | 26.6°C79.9°F | 45 mm1.8″ | — |
| August | 25.8°C78.4°F | 51 mm2″ | — |
| September | 22.5°C72.5°F | 33 mm1.3″ | Sunny & Warm |
| October | 16.6°C61.9°F | 27 mm1.1″ | Sunny & Mild |
| November | 10°C50°F | 24 mm0.9″ | — |
| December | 5.7°C42.3°F | 30 mm1.2″ | — |
Frequently asked questions
What is the best time to visit Arizona?
The best months to visit Arizona, United States of America for sunny, dry weather are May, June, September, October. The warmest month is July at an area-wide average of 26.6°C / 79.9°F, and the driest is June with about 7 mm / 0.3 in of rainfall.
What is the climate of Arizona?
Arizona, United States of America has area-weighted monthly average temperatures ranging from 5.3°C / 41.5°F in January to 26.6°C / 79.9°F in July. Annual rainfall averages about 323 mm / 12.7 in, with the wettest month being August (51 mm / 2 in) and the driest June (7 mm / 0.3 in). Because this is an area average across the whole subdivision, local city values can differ substantially.
What is the hottest month in Arizona?
The hottest month in Arizona is July, with an area-wide average temperature of 26.6°C / 79.9°F.
What is the coldest month in Arizona?
The coldest month in Arizona is January, with an area-wide average temperature of 5.3°C / 41.5°F.
When does it rain most in Arizona?
The wettest month in Arizona is August, averaging about 51 mm / 2 in of rainfall. The driest is June with about 7 mm / 0.3 in.