Riverside, CA Weather
Riverside hourly forecast: next 24 hours
Today's high of 104°F (40°C) is about 9°F (5°C) above the typical July high of 95°F (35°C).
Current conditions in detail
Riverside weather tomorrow (Saturday, July 18)
Tomorrow in Riverside looks sunny, with a high of 93° and an overnight low of 74°. Rain is unlikely (1% chance). Winds top out near 12 mph, and the UV index reaches 12 (extreme).
Riverside 14-day forecast
About the weather in Riverside
Located in California, United States, Riverside experiences a semi-arid climate with big day-to-night temperature swings and modest rainfall. Afternoon temperatures peak near 96°F (35°C) in August and dip to about 65°F (18°C) in January, with around 14.7 inches (374 mm) of precipitation falling across the year.
Riverside weather: quick facts
- Hottest month: August - highs near 96°F (35°C)
- Coldest month: January - highs near 65°F (18°C)
- Record high: 116°F (47°C) · Record low: 28°F (-2°C) (2015–2024)
- Wettest month: January (6 rainy days) · Sunniest: July (13.7 h sun/day)
- Climate type: semi-arid - big day-to-night temperature swings and modest rainfall
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 96°F (35°C) and overnight lows stay near 67°F (19°C). The coolest month is January, with typical highs of 65°F (18°C) and lows around 44°F (7°C). Based on 2015–2024 weather data, temperatures have reached as high as 116°F (47°C) and dropped as low as 28°F (-2°C).
Rain, sun and snow
January is usually the wettest month. It brings about 3.4 inches (87 mm) of rain over 6 days, while June is the driest. July brings the most sunshine, averaging 13.7 hours of sun a day.
Season by season
Spring (March through May)
Spring in Riverside is mild and warm, with daytime highs averaging 75°F (24°C) and nights around 51°F (11°C); rain falls on about 14 days over the three months.
Summer (June through August)
Summer in Riverside turns very hot, with daytime highs averaging 93°F (34°C) and nights around 64°F (18°C); precipitation is infrequent.
Fall (September through November)
Fall in Riverside is hot, with daytime highs averaging 83°F (29°C) and nights around 57°F (14°C); precipitation is infrequent.
Winter (December through February)
Winter in Riverside is mild, with daytime highs averaging 66°F (19°C) and nights around 44°F (7°C); rain falls on about 17 days over the three months.
Average temperatures in Riverside by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 65° | 44° | 6 | 3.4 in | 8.3 h/day | 63% |
| February | 68° | 45° | 6 | 2.6 in | 9.0 h/day | 58% |
| March | 70° | 47° | 8 | 2.7 in | 10.2 h/day | 64% |
| April | 77° | 52° | 3 | 0.8 in | 11.3 h/day | 57% |
| May | 79° | 54° | 3 | 0.5 in | 12.0 h/day | 62% |
| June | 89° | 60° | 0 | 0.0 in | 13.3 h/day | 55% |
| July | 95° | 65° | 0 | 0.2 in | 13.7 h/day | 52% |
| August | 96° | 67° | 1 | 0.2 in | 12.7 h/day | 51% |
| September | 92° | 64° | 2 | 0.4 in | 11.3 h/day | 53% |
| October | 84° | 58° | 2 | 0.6 in | 10.3 h/day | 49% |
| November | 74° | 49° | 3 | 1.0 in | 9.4 h/day | 46% |
| December | 66° | 44° | 5 | 2.4 in | 8.2 h/day | 56% |