Last updated: May 6, 2024
Under the Köppen–Geiger climate classification Arizona features a tropical rainforest climate (Af).Temperatures typically range between 24 °C (75 °F) and 27 °C (82 °F) through the year, but rarely can drop to 17 °C (64 °F) or can rise to as high as 33 °C (91 °F).The average annual precipitation amounts to about 1989 mm (78.3 inches) and receives 225 rainy days on the 1 mm (0.04 inches) threshold annually.Arizona enjoys an average of 3580 hours of sunshine throughout the year, and daylight varies from 11 hours 11 minutes to 13 hours 1 minutes per day.
The warmest months in Arizona are May, June and September, with daily mean temperatures ranging from 27 to 27 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 24 to 24 °C (75 - 76 °F) throughout the day. On average each year, Arizona experiences 298 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum | 30°C (86°F) | 29°C (85°F) | 30°C (85°F) | 31°C (89°F) | 32°C (90°F) | 33°C (91°F) | 30°C (87°F) | 31°C (89°F) | 31°C (89°F) | 31°C (88°F) | 29°C (84°F) | 29°C (85°F) |
Mean maximum | 28°C (83°F) | 28°C (84°F) | 29°C (84°F) | 31°C (88°F) | 31°C (88°F) | 31°C (88°F) | 30°C (86°F) | 30°C (87°F) | 31°C (87°F) | 31°C (88°F) | 28°C (83°F) | 28°C (83°F) |
Average high | 25°C (78°F) | 26°C (80°F) | 27°C (80°F) | 28°C (83°F) | 29°C (85°F) | 29°C (85°F) | 29°C (84°F) | 29°C (84°F) | 29°C (85°F) | 28°C (83°F) | 26°C (80°F) | 26°C (79°F) |
Daily mean | 24°C (75°F) | 24°C (76°F) | 25°C (77°F) | 26°C (79°F) | 27°C (81°F) | 27°C (82°F) | 27°C (81°F) | 27°C (81°F) | 27°C (81°F) | 26°C (80°F) | 25°C (77°F) | 24°C (75°F) |
Average low | 22°C (71°F) | 22°C (72°F) | 23°C (73°F) | 24°C (76°F) | 25°C (78°F) | 26°C (78°F) | 25°C (77°F) | 25°C (78°F) | 25°C (77°F) | 25°C (76°F) | 23°C (74°F) | 22°C (72°F) |
Mean minimum | 20°C (68°F) | 20°C (68°F) | 21°C (70°F) | 22°C (72°F) | 23°C (74°F) | 24°C (76°F) | 24°C (75°F) | 24°C (75°F) | 24°C (75°F) | 23°C (74°F) | 21°C (71°F) | 20°C (68°F) |
Minimum | 19°C (66°F) | 17°C (64°F) | 20°C (68°F) | 21°C (70°F) | 22°C (72°F) | 23°C (74°F) | 23°C (74°F) | 24°C (75°F) | 24°C (75°F) | 21°C (71°F) | 20°C (69°F) | 19°C (67°F) |
Compare temperature, precipitation, sunshine, UV index in Arizona, Atlántida, Honduras with other places around the world.
Arizona usually has the most precipitation in October, November and December, with an average of 22 rainy days and 305 mm (12.0 inches) of precipitation per month.The driest months in Arizona are March, April and May. On average, 77 mm (3.0 inches) of precipitation falls during these months.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Average precipitation mm (inches) | 208 (8.2) | 104 (4.1) | 78 (3.1) | 70 (2.7) | 84 (3.3) | 153 (6.0) | 102 (4.0) | 139 (5.5) | 136 (5.4) | 276 (10.9) | 387 (15.2) | 252 (9.9) |
Average precipitation days (≥ 1 mm) | 15 | 9 | 9 | 8 | 19 | 24 | 22 | 25 | 26 | 26 | 23 | 19 |
The sunniest months in Arizona are May, July and August, when the sun shines an average of 10 hours 34 minutes a day.Least sunny months in Arizona: January, November and December receive an average of 8 hours 23 minutes of sunshine daily.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean monthly sunshine hours | 227 | 282 | 319 | 315 | 330 | 310 | 327 | 326 | 310 | 287 | 266 | 278 |
Mean daily daylight hours | 11h 17m | 11h 37m | 12h 2m | 12h 29m | 12h 51m | 13h 1m | 12h 56m | 12h 36m | 12h 11m | 11h 45m | 11h 22m | 11h 11m |
Arizona experiences the highest level of ultraviolet (UV) radiation in March, April and May, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure.January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Arizona UV Index data.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
UV Index (month maximum) | 10 | 12 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 10 | 9 |