Tucson, AZ Weather
Tucson hourly forecast: next 24 hours
Today's high of 84°F (29°C) is about 10°F (6°C) below the typical September high of 94°F (35°C).
Current conditions in detail
Tucson weather tomorrow (Wednesday, September 16)
Tomorrow in Tucson looks patchy rain nearby, with a high of 81° and an overnight low of 68°. There is a 67% chance of rain - plan accordingly. Winds top out near 16 mph, and the UV index reaches 8 (very high).
Tucson 14-day forecast
About the weather in Tucson
Weather in Tucson follows a semi-arid pattern. The warmest and coolest months, July and January, average 100°F (38°C) and 64°F (18°C) by day; nights in those months run 78°F (26°C) and 41°F (5°C).
Tucson weather: quick facts
- Hottest month: July - highs near 100°F (38°C)
- Coldest month: January - highs near 64°F (18°C)
- Decade extremes (2015-2024): 113°F (45°C) high · 26°F (-3°C) low
- Wettest month: July (8 rainy days) · Sunniest: May (12.9 h sun/day)
- Climate type: semi-arid
- Annual swing: 21°C between the average warmest and coolest month · day to night: 14°C
- Snow: about 1 days a year
- Months averaging 30°C or hotter: 6
- Average humidity: 36%
Temperatures through the year
Warmth peaks in July: highs of 100°F (38°C), lows of 78°F (26°C). January bottoms out at 64°F (18°C) in daylight, 41°F (5°C) after dark. Snowfall is rare but not unheard of.
Rain, sun and snow
5 months average under 20 mm of rain, the longest unbroken stretch running April through June. Average highs hold at or above 30°C for 6 months of the year, May through October being the unbroken run. Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is February through March. The gridded 2015-2024 daily record for this location tops out at 113°F (45°C) and bottoms at 26°F (-3°C) - decade extremes, not all-time station records.
Season by season
Spring (March through May)
Through spring, Tucson brings hot afternoons: 83°F (28°C) by day, 56°F (13°C) after dark, and precipitation is sparse, near 1.5 inches (38 mm) for the season. Daylight is generous - around 12.0 hours of sun a day.
Summer (June through August)
Through summer, Tucson runs at full heat: 100°F (38°C) by day, 76°F (25°C) after dark, and rain comes on about 15 days over the three months. Daylight is generous - around 12.2 hours of sun a day.
Fall (September through November)
Fall in Tucson is hot, with daytime highs averaging 85°F (30°C) and nights around 61°F (16°C); rain comes on about 10 days over the three months. Daylight is generous - around 10.5 hours of sun a day.
Winter (December through February)
Winter in Tucson stays on the cool side of mild, with daytime highs averaging 66°F (19°C) and nights around 42°F (6°C); rain comes on about 14 days over the three months.
Average temperatures in Tucson by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 64° | 41° | 5 | 1.8 in | 9.0 h/day | 53% |
| February | 68° | 43° | 4 | 1.4 in | 9.8 h/day | 44% |
| March | 75° | 49° | 4 | 1.2 in | 10.6 h/day | 36% |
| April | 84° | 56° | 1 | 0.2 in | 12.5 h/day | 22% |
| May | 91° | 63° | 1 | 0.1 in | 12.9 h/day | 20% |
| June | 101° | 74° | 2 | 0.3 in | 12.9 h/day | 20% |
| July | 100° | 78° | 8 | 2.0 in | 11.8 h/day | 39% |
| August | 98° | 76° | 6 | 1.6 in | 11.9 h/day | 44% |
| September | 94° | 71° | 5 | 1.9 in | 11.3 h/day | 40% |
| October | 87° | 61° | 3 | 0.6 in | 10.7 h/day | 34% |
| November | 75° | 50° | 3 | 0.7 in | 9.5 h/day | 38% |
| December | 66° | 43° | 5 | 1.4 in | 8.7 h/day | 48% |