Oro Valley Climate by Month
Oro Valley, Arizona, United States
Very hot summers and cool winters, with little rain.
The climate in Oro Valley is one of very hot summers and cool winters, with little rain. June is the warmest month, with highs around 100°F (38°C); December is the coolest at 66°F (19°C), and nights dip to 40°F (4°C). It gets only 11 in (275 mm) of rain a year. April to June are almost completely dry. The air is dry, averaging 31% relative humidity.
- Warmest month
- 100°F(38°C)
- Average high, June
- Coldest nights
- 40°F(4°C)
- Average low, December
- Rain per year
- 11 in(275 mm)
- No clear rainy season
- Humidity
- 31%
- Sunniest: June
Best and worst months in Oro Valley
Best for weatherThe most comfortable weather comes in March and November, with highs around 75°F (24°C) and about 0.6 in (17 mm) of rain a month.
Least pleasantJuly and August are the least pleasant; July is the hottest, with highs of 100°F (38°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 March.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Oro Valley weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 66°F(19°C) | 40°F(4°C) | 1.0 in(26 mm) | 36% | 3.4 |
| FebFebruary | 69°F(21°C) | 42°F(6°C) | 0.9 in(24 mm) | 40% | 4.0 |
| MarMarchBest | 75°F(24°C) | 47°F(8°C) | 0.7 in(17 mm) | 33% | 5.6 |
| AprApril | 83°F(28°C) | 52°F(11°C) | 0.3 in(7 mm) | 22% | 6.9 |
| MayMay | 91°F(33°C) | 61°F(16°C) | 0.2 in(4 mm) | 20% | 7.7 |
| JunJune | 100°F(38°C) | 70°F(21°C) | 0.3 in(7 mm) | 20% | 7.9 |
| JulJuly | 100°F(38°C) | 75°F(24°C) | 2.0 in(51 mm) | 34% | 6.9 |
| AugAugust | 98°F(37°C) | 74°F(24°C) | 1.7 in(44 mm) | 37% | 6.3 |
| SepSeptember | 96°F(35°C) | 70°F(21°C) | 1.3 in(34 mm) | 34% | 5.7 |
| OctOctober | 87°F(30°C) | 58°F(15°C) | 0.7 in(18 mm) | 29% | 4.9 |
| NovNovemberBest | 75°F(24°C) | 47°F(8°C) | 0.6 in(16 mm) | 33% | 3.7 |
| DecDecember | 66°F(19°C) | 40°F(4°C) | 1.1 in(27 mm) | 37% | 3.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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