Green Valley, Arizona Weather
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Climate of Green Valley: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), June is usually the hottest month in Green Valley, with average daytime highs around 38°C. December is the coolest, when nights typically fall to about 3°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 35°C, so the seasons feel very different from each other.
The area receives about 320 mm of rain in a typical year. Rainfall is modest in every month; July is the wettest at about 83 mm. The driest stretch is March to June and October to November, with under 20 mm a month.
For outdoor plans and travel, March to April and October to November usually offer the most comfortable weather in Green Valley, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 17° | 3° | 24 mm | 46% |
| Feb | 18° | 4° | 21 mm | 44% |
| Mar | 23° | 7° | 14 mm | 37% |
| Apr | 27° | 10° | 8 mm | 28% |
| May | 32° | 15° | 4 mm | 22% |
| Jun | 38° | 21° | 8 mm | 19% |
| Jul | 36° | 23° | 83 mm | 42% |
| Aug | 35° | 22° | 64 mm | 47% |
| Sep | 33° | 20° | 40 mm | 43% |
| Oct | 28° | 14° | 15 mm | 37% |
| Nov | 22° | 8° | 14 mm | 39% |
| Dec | 17° | 3° | 27 mm | 46% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Green Valley. Values describe typical conditions, not a forecast.
About Green Valley weather
Green Valley lies in Arizona's mostly desert climate, with cooler high country in the north — about 41 km south of Tucson. Expect extremely hot summers (May–September) with highs regularly above 40°C in the low deserts. Winter brings mild, dry winters in the desert, cold with snow in the northern highlands. This page shows live, auto-refreshing weather for Green Valley: 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
Green Valley is about 41 km south of Tucson, in Arizona.
Green Valley 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 Green Valley's exact coordinates. No fixed schedule, the page updates whenever you load it.
June is usually the hottest month in Green Valley, with average daytime highs of about 38°C and nights around 21°C.
The coldest nights come in December, when the average low is about 3°C and daytime highs reach around 17°C. Frost is possible on clear, calm nights.
Green Valley receives about 320 mm of rain in a typical year. July is the wettest month at roughly 83 mm; no month averages more than 100 mm.
March to April and October to November usually offer the most comfortable weather in Green Valley, with mild daytime temperatures and little rain.
In November Green Valley typically sees daytime highs near 22°C and lows near 8°C, with about 14 mm of rain over the month and average humidity around 39%. 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.
The current temperature for Green Valley updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Green Valley'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.