UV Index
UV Index
Today's UV index in Riverside, United States 
will be up to 11.1, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-06-21
UV index at 11.1 in Riverside means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
Riverside, United States, has a UV index that can reach very high levels, especially during sunny summer days, often ranging from 7 to 11. This means the sun can be quite strong there.
Seasonally, Riverside experiences hot, dry summers with temperatures often above 90°F (32°C) and mild, wetter winters where temperatures generally stay between 40°F and 70°F (4°C to 21°C). Rain mostly falls in winter and early spring.
Compared to other places in Southern California, Riverside is warmer and drier than coastal cities like Los Angeles but cooler than desert areas like Palm Springs. It has less rain and milder temperatures than nearby regions in Arizona and Nevada.
See the UV index hour by hour for Riverside, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.