Oro Valley, Arizona Weather
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Climate of Oro Valley: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), June is usually the hottest month in Oro Valley, with average daytime highs around 40°C. December is the coolest, when nights typically fall to about 4°C. That is a wide yearly range of roughly 36°C, so the seasons feel very different from each other.
The area receives about 290 mm of rain in a typical year. Rainfall is modest in every month; July is the wettest at about 63 mm. The driest stretch is March 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 Oro Valley, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 18° | 4° | 27 mm | 46% |
| Feb | 19° | 5° | 23 mm | 43% |
| Mar | 24° | 8° | 16 mm | 37% |
| Apr | 28° | 11° | 8 mm | 28% |
| May | 34° | 16° | 5 mm | 21% |
| Jun | 40° | 22° | 6 mm | 17% |
| Jul | 38° | 25° | 63 mm | 38% |
| Aug | 37° | 24° | 52 mm | 42% |
| Sep | 35° | 21° | 31 mm | 38% |
| Oct | 30° | 15° | 15 mm | 33% |
| Nov | 23° | 9° | 15 mm | 36% |
| Dec | 17° | 4° | 28 mm | 45% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Oro Valley. Values describe typical conditions, not a forecast.
About Oro Valley weather
Oro Valley, in Arizona's mostly desert climate, with cooler high country in the north, is positioned about 19 km north of Tucson. Oro Valley gets extremely hot summers (May–September) with highs regularly above 40°C in the low deserts each year. Oro Valley closes out the year with mild, dry winters in the desert, cold with snow in the northern highlands. This page shows live, auto-refreshing weather for Oro 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
Oro Valley is about 19 km north of Tucson, in Arizona.
Oro 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 Oro Valley's exact coordinates. No fixed schedule, the page updates whenever you load it.
June is usually the hottest month in Oro Valley, with average daytime highs of about 40°C and nights around 22°C.
The coldest nights come in December, when the average low is about 4°C and daytime highs reach around 17°C.
Oro Valley receives about 290 mm of rain in a typical year. July is the wettest month at roughly 63 mm; no month averages more than 100 mm.
February to April and October to November usually offer the most comfortable weather in Oro Valley, with mild daytime temperatures and little rain.
In November Oro Valley typically sees daytime highs near 23°C and lows near 9°C, with about 15 mm of rain over the month and average humidity around 36%. 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 Oro 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.
Oro 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.