Tempe, Arizona Weather
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Climate of Tempe: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Tempe, with average daytime highs around 41°C. December is the coolest, when nights typically fall to about 4°C. That is a wide yearly range of roughly 37°C, so the seasons feel very different from each other.
The area receives about 250 mm of rain in a typical year. Rainfall is modest in every month; January is the wettest at about 33 mm. The driest stretch is April to June and October to November, with under 20 mm a month.
For outdoor plans and travel, February to April and October to November usually offer the most comfortable weather in Tempe, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 18° | 4° | 33 mm | 46% |
| Feb | 20° | 6° | 32 mm | 44% |
| Mar | 25° | 9° | 21 mm | 38% |
| Apr | 29° | 12° | 8 mm | 29% |
| May | 34° | 17° | 6 mm | 22% |
| Jun | 41° | 23° | 2 mm | 15% |
| Jul | 41° | 27° | 33 mm | 30% |
| Aug | 40° | 26° | 33 mm | 35% |
| Sep | 37° | 23° | 22 mm | 31% |
| Oct | 31° | 16° | 14 mm | 30% |
| Nov | 24° | 10° | 19 mm | 34% |
| Dec | 18° | 4° | 31 mm | 45% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Tempe. Values describe typical conditions, not a forecast.
About Tempe weather
Tempe is one of many towns in Arizona's mostly desert climate, with cooler high country in the north, about 16 km east of Phoenix. Before the rains arrive, there's extremely hot summers (May–September) with highs regularly above 40°C in the low deserts. Cooler months mean mild, dry winters in the desert, cold with snow in the northern highlands. This page shows live, auto-refreshing weather for Tempe: 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
Tempe is about 16 km east of Phoenix, in Arizona.
Tempe 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 Tempe's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Tempe, with average daytime highs of about 41°C and nights around 27°C. Afternoons above 40°C are common then, so heatwave precautions matter.
The coldest nights come in December, when the average low is about 4°C and daytime highs reach around 18°C.
Tempe receives about 250 mm of rain in a typical year. January is the wettest month at roughly 33 mm; no month averages more than 100 mm.
February to April and October to November usually offer the most comfortable weather in Tempe, with mild daytime temperatures and little rain.
In November Tempe typically sees daytime highs near 24°C and lows near 10°C, with about 19 mm of rain over the month and average humidity around 34%. 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.
Live temperature for Tempe is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Tempe'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.