Riverside Climate by Month
Riverside, California, United States
Hot summers and mild winters, with little rain, mostly from December to March.
The climate in Riverside is one of hot summers and mild winters, with little rain, mostly from December to March. Afternoon highs range from 68°F (20°C) in December to 95°F (35°C) in August, and December nights average 42°F (6°C). It gets only 12 in (294 mm) of rain a year. May to September are almost completely dry.
- Warmest month
- 95°F(35°C)
- Average high, August
- Coldest nights
- 42°F(6°C)
- Average low, December
- Rain per year
- 12 in(294 mm)
- Wettest: February
- Humidity
- 47%
- Sunniest: June
Best and worst months in Riverside
Best for weatherApril and November are the best time for weather in Riverside: highs near 76°F (25°C) and about 0.9 in (22 mm) of rain a month.
Least pleasantJuly and August are the least pleasant; August is the hottest, with highs of 95°F (35°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 November.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Riverside weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 68°F(20°C) | 43°F(6°C) | 2.4 in(60 mm) | 46% | 2.9 |
| FebFebruary | 69°F(21°C) | 44°F(7°C) | 2.7 in(68 mm) | 51% | 3.4 |
| MarMarch | 72°F(22°C) | 46°F(8°C) | 1.8 in(45 mm) | 53% | 5.0 |
| AprAprilBest | 77°F(25°C) | 49°F(10°C) | 0.9 in(22 mm) | 46% | 6.0 |
| MayMay | 80°F(27°C) | 54°F(12°C) | 0.3 in(7 mm) | 49% | 6.5 |
| JunJune | 86°F(30°C) | 58°F(14°C) | 0.1 in(2 mm) | 49% | 7.1 |
| JulJuly | 92°F(34°C) | 62°F(17°C) | 0.1 in(2 mm) | 47% | 6.9 |
| AugAugust | 95°F(35°C) | 63°F(17°C) | 0.1 in(2 mm) | 44% | 6.7 |
| SepSeptember | 91°F(33°C) | 60°F(16°C) | 0.2 in(5 mm) | 46% | 5.6 |
| OctOctober | 83°F(29°C) | 54°F(12°C) | 0.4 in(11 mm) | 42% | 4.3 |
| NovNovemberBest | 75°F(24°C) | 47°F(8°C) | 0.9 in(22 mm) | 44% | 3.3 |
| DecDecember | 68°F(20°C) | 42°F(6°C) | 1.9 in(48 mm) | 47% | 2.7 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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