Heat Advisory
* WHAT...High temperatures mostly in the mid 80s to upper 90s below
6500 feet expected.
* WHERE...San Bernardino County Mountains.
* WHEN...Until 8 PM PDT Sunday.
* IMPACTS...Hot temperatures may cause heat illnesses.
Extreme Heat Warning
* WHAT...Dangerously hot conditions with high temperatures of 108 to
114 expected.
* WHERE...Coachella Valley, San Diego County Deserts, and San
Gorgonio Pass near Banning.
* WHEN...Until 8 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme…
Tomorrow in Riverside looks
sunny, with a high of 98°
and an overnight low of 69°.
Rain is unlikely (1% chance).
Winds top out near 12 mph,
and the UV index reaches 10 (very high).
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
Monthly averages for Riverside based on 2015–2024 weather data.
August is the hottest month in Riverside, with average highs of 96°F (35°C) and overnight lows near 67°F (19°C). In the past decade the temperature has peaked at 116°F (47°C).
What is the coldest month in Riverside?
January is the coldest month, with highs averaging 65°F (18°C) and lows around 44°F (7°C). The lowest reading in recent years was 28°F (-2°C).
What is the rainiest month in Riverside?
January is typically the wettest month, averaging 3.4 inches (87 mm) of precipitation across about 6 days. June is usually the driest.
Does it snow in Riverside?
Snow is essentially absent in Riverside - the 2015–2024 record shows no regular measurable snowfall.
What is the best time to visit Riverside?
The best time to visit Riverside is generally January to May and November, when temperatures are at their most comfortable before or after the peak heat. Daytime temperatures in that window typically sit near 72°F (22°C).
How sunny is Riverside?
Riverside averages 10.8 hours of sunshine per day across the year. July is the sunniest month at about 13.7 hours of sun a day.
Is Riverside humid?
Relative humidity in Riverside averages about 56% over the year, which feels moderate. The most comfortable months tend to fall in the drier part of the year.