Phoenix Climate by Month
Phoenix, Arizona, United States
Very hot summers and mild winters, with little rain.
Very hot summers and mild winters, with little rain: that's Phoenix's climate in short. Expect highs of 108°F (42°C) in July and 69°F (21°C) in December, with the coldest nights (December) near 42°F (6°C). It gets only 6.8 in (172 mm) of rain a year. April to June are almost completely dry. The air is dry, averaging 30% relative humidity.
- Warmest month
- 108°F(42°C)
- Average high, July
- Coldest nights
- 42°F(6°C)
- Average low, December
- Rain per year
- 6.8 in(172 mm)
- No clear rainy season
- Humidity
- 30%
- Sunniest: June
Best and worst months in Phoenix
Best for weatherFebruary, March and November are the best time for weather in Phoenix: highs near 77°F (25°C) and about 0.7 in (17 mm) of rain a month.
Least pleasantJuly and August are the least pleasant; July is the hottest, with highs of 108°F (42°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 February.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Phoenix weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 70°F(21°C) | 43°F(6°C) | 0.6 in(16 mm) | 39% | 3.1 |
| FebFebruaryBest | 73°F(23°C) | 46°F(8°C) | 0.7 in(19 mm) | 41% | 3.9 |
| MarMarchBest | 80°F(26°C) | 50°F(10°C) | 0.7 in(18 mm) | 33% | 5.4 |
| AprApril | 88°F(31°C) | 56°F(13°C) | 0.2 in(5 mm) | 22% | 6.7 |
| MayMay | 96°F(36°C) | 65°F(19°C) | 0.1 in(3 mm) | 19% | 7.6 |
| JunJune | 106°F(41°C) | 74°F(23°C) | 0.1 in(2 mm) | 17% | 8.0 |
| JulJuly | 108°F(42°C) | 81°F(27°C) | 0.8 in(20 mm) | 27% | 7.0 |
| AugAugust | 107°F(41°C) | 80°F(27°C) | 0.9 in(24 mm) | 32% | 6.2 |
| SepSeptember | 102°F(39°C) | 74°F(23°C) | 0.6 in(16 mm) | 29% | 5.7 |
| OctOctober | 91°F(33°C) | 61°F(16°C) | 0.6 in(16 mm) | 29% | 4.8 |
| NovNovemberBest | 78°F(26°C) | 49°F(10°C) | 0.5 in(13 mm) | 35% | 3.5 |
| DecDecember | 69°F(21°C) | 42°F(6°C) | 0.8 in(20 mm) | 40% | 2.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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