Tucson, Arizona Weather
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Climate of Tucson: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), June is usually the hottest month in Tucson, with average daytime highs around 36°C. December is the coolest, when nights typically fall to about 0°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 36°C, so the seasons feel very different from each other.
The area receives about 320 mm of rain in a typical year. Rainfall is modest in every month; July is the wettest at about 82 mm. The driest stretch is March to June and October to November, with under 20 mm a month.
For outdoor plans and travel, April to May and September to November usually offer the most comfortable weather in Tucson, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 15° | 1° | 24 mm | 49% |
| Feb | 17° | 2° | 21 mm | 46% |
| Mar | 21° | 5° | 14 mm | 39% |
| Apr | 25° | 8° | 8 mm | 30% |
| May | 30° | 13° | 4 mm | 24% |
| Jun | 36° | 19° | 9 mm | 20% |
| Jul | 34° | 21° | 82 mm | 45% |
| Aug | 33° | 20° | 65 mm | 49% |
| Sep | 31° | 17° | 41 mm | 46% |
| Oct | 26° | 11° | 15 mm | 41% |
| Nov | 20° | 5° | 16 mm | 42% |
| Dec | 15° | 0° | 25 mm | 50% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Tucson. Values describe typical conditions, not a forecast.
About Tucson weather
Tucson is a place in Arizona's mostly desert climate, with cooler high country in the north, located about 173 km south-east of Phoenix. Tucson gets extremely hot summers (May–September) with highs regularly above 40°C in the low deserts each year. Tucson closes out the year with mild, dry winters in the desert, cold with snow in the northern highlands. This page shows live, auto-refreshing weather for Tucson: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Phoenix.
Frequently asked questions
Tucson is about 173 km south-east of Phoenix, in Arizona.
Tucson sees mild, dry winters in the desert, cold with snow in the northern highlands.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Tucson's exact coordinates. No fixed schedule, the page updates whenever you load it.
June is usually the hottest month in Tucson, with average daytime highs of about 36°C and nights around 19°C.
The coldest nights come in December, when the average low is about 0°C and daytime highs reach around 15°C. Frost is possible on clear, calm nights.
Tucson receives about 320 mm of rain in a typical year. July is the wettest month at roughly 82 mm; no month averages more than 100 mm.
April to May and September to November usually offer the most comfortable weather in Tucson, with mild daytime temperatures and little rain.
In November Tucson typically sees daytime highs near 20°C and lows near 5°C, with about 16 mm of rain over the month and average humidity around 42%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Tucson updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Tucson's day-to-day weather follows the broader pattern of Arizona described above. See the hourly weather forecast or the air quality index for more detail.