Tucson, AZ Climate & Monthly Averages
The climate of Tucson
Tucson has a semi-arid climate, marked by big day-to-night temperature swings and modest rainfall. Average daytime highs range from about 64°F (18°C) in January to around 100°F (38°C) in July, and the city records roughly 45 days of measurable precipitation a year.
Climate quick facts
- Hottest month: July - highs near 100°F (38°C)
- Coldest month: January - highs near 64°F (18°C)
- Record high: 113°F (45°C) · Record low: 26°F (-3°C) (2015–2024)
- Wettest month: July (8 rainy days) · Sunniest: May (12.9 h sun/day)
- Climate type: semi-arid - big day-to-night temperature swings and modest rainfall
- Snow: about 1 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 100°F (38°C) and overnight lows stay near 78°F (26°C). The coolest month is January, with typical highs of 64°F (18°C) and lows around 41°F (5°C). Based on 2015–2024 weather data, temperatures have reached as high as 113°F (45°C) and dropped as low as 26°F (-3°C).
Rain, sun and snow
July is usually the wettest month. It brings about 2.0 inches (52 mm) of rain over 8 days, while May is the driest. May brings the most sunshine, averaging 12.9 hours of sun a day. Snowfall is rare but not unheard of.
Monthly climate table
| 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% |
Tucson month by month
Tucson weather in January
January brings highs around 64°F (18°C), lows near 41°F (5°C), about 5 wet days - typically the coldest month of the year in Tucson.
Tucson weather in February
February brings highs around 68°F (20°C), lows near 43°F (6°C), about 4 wet days.
Tucson weather in March
March brings highs around 75°F (24°C), lows near 49°F (9°C), about 4 wet days.
Tucson weather in April
April brings highs around 84°F (29°C), lows near 56°F (13°C), about 1 wet days.
Tucson weather in May
May brings highs around 91°F (33°C), lows near 63°F (17°C), about 1 wet days - typically the driest month and the sunniest month of the year in Tucson.
Tucson weather in June
June brings highs around 101°F (38°C), lows near 74°F (24°C), about 2 wet days.
Tucson weather in July
July brings highs around 100°F (38°C), lows near 78°F (26°C), about 8 wet days - typically the hottest month and the wettest month of the year in Tucson.
Tucson weather in August
August brings highs around 98°F (36°C), lows near 76°F (25°C), about 6 wet days.
Tucson weather in September
September brings highs around 94°F (35°C), lows near 71°F (22°C), about 5 wet days.
Tucson weather in October
October brings highs around 87°F (30°C), lows near 61°F (16°C), about 3 wet days.
Tucson weather in November
November brings highs around 75°F (24°C), lows near 50°F (10°C), about 3 wet days.
Tucson weather in December
December brings highs around 66°F (19°C), lows near 43°F (6°C), about 5 wet days.
Seasons in Tucson
Spring (March through May)
Spring in Tucson is hot, with daytime highs averaging 83°F (28°C) and nights around 56°F (13°C); precipitation is infrequent.
Summer (June through August)
Summer in Tucson is intensely hot, with daytime highs averaging 100°F (38°C) and nights around 76°F (25°C); rain falls on about 15 days over the three months.
Fall (September through November)
Fall in Tucson runs hot, with daytime highs averaging 85°F (30°C) and nights around 61°F (16°C); rain falls on about 10 days over the three months.
Winter (December through February)
Winter in Tucson is mild, with daytime highs averaging 66°F (19°C) and nights around 42°F (6°C); rain falls on about 14 days over the three months.
Climate questions, answered
What is the average temperature in Tucson?
Is Tucson hot in summer?
Is Tucson cold in winter?
How many rainy days does Tucson get in a year?
Best time to visit Tucson
The best time to visit Tucson is generally November to April, when temperatures are at their most comfortable before or after the peak heat. Daytime temperatures in that window typically sit near 72°F (22°C).
Pack for Tucson with lightweight, breathable clothing and strong sun protection for the hot months. Evenings can feel noticeably cooler than afternoons - July nights average 78°F (26°C).
Tucson temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.