Tucson Climate by Month
Tucson, Arizona, United States
Very hot summers and cool winters, with little rain.
Tucson has very hot summers and cool winters, with little rain. Expect highs of 102°F (39°C) in June and 67°F (20°C) in December, with the coldest nights (December) near 40°F (5°C). It gets only 10 in (262 mm) of rain a year. April to June are almost completely dry. The air is dry, averaging 30% relative humidity.
- Warmest month
- 102°F(39°C)
- Average high, June
- Coldest nights
- 40°F(5°C)
- Average low, December
- Rain per year
- 10 in(262 mm)
- No clear rainy season
- Humidity
- 30%
- Sunniest: June
Best and worst months in Tucson
Best for weatherThe most comfortable weather comes in March and November, with highs around 76°F (25°C) and almost no rain.
Least pleasantJuly and August are the least pleasant; July is the hottest, with highs of 102°F (39°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in November.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Tucson weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 68°F(20°C) | 41°F(5°C) | 0.9 in(22 mm) | 35% | 3.3 |
| FebFebruary | 71°F(22°C) | 43°F(6°C) | 0.9 in(22 mm) | 38% | 4.0 |
| MarMarchBest | 77°F(25°C) | 48°F(9°C) | 0.6 in(15 mm) | 31% | 5.6 |
| AprApril | 84°F(29°C) | 53°F(12°C) | 0.2 in(6 mm) | 21% | 6.9 |
| MayMay | 93°F(34°C) | 62°F(17°C) | 0.1 in(3 mm) | 19% | 7.6 |
| JunJune | 102°F(39°C) | 72°F(22°C) | 0.3 in(8 mm) | 18% | 7.8 |
| JulJuly | 102°F(39°C) | 77°F(25°C) | 2.0 in(51 mm) | 32% | 6.5 |
| AugAugust | 100°F(38°C) | 76°F(24°C) | 1.7 in(44 mm) | 38% | 6.0 |
| SepSeptember | 96°F(36°C) | 71°F(22°C) | 1.4 in(36 mm) | 33% | 5.6 |
| OctOctober | 87°F(31°C) | 59°F(15°C) | 0.7 in(19 mm) | 29% | 4.9 |
| NovNovemberBest | 76°F(24°C) | 47°F(9°C) | 0.6 in(14 mm) | 32% | 3.7 |
| DecDecember | 67°F(20°C) | 40°F(5°C) | 0.9 in(22 mm) | 35% | 3.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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