San Bernardino UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index8
- Avg Clouds0%
- Max Temp37.4 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in San Bernardino, United States 
will reach a high of 8 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!
Last checked: 2026-03-18
Hourly Forecast Chart
Today's Safety Tips
The risk is very high. It's best to stay out of the sun between 10 a.m. and 4 p.m. If you must be outside, wear protective clothing and apply sunscreen often.
San Bernardino's UV Index
San Bernardino's UV index ranges mostly from moderate to high, peaking during summer months around 8 to 10, and lowering to about 2 to 4 in winter, reflecting strong sun exposure especially in warmer seasons.
Weather Seasons
The city experiences hot, dry summers with temperatures often above 90°F (32°C), and mild, wetter winters where temperatures range from 40°F to 65°F (4°C to 18°C). Rain usually falls between November and March.
San Bernardino's Climate
Compared to other parts of Southern California, San Bernardino is warmer and drier than coastal cities like Los Angeles but cooler than desert areas such as Palm Springs. It is less humid and sunnier than regions farther north in California and neighboring states.
Hourly UV Index Trend
See the UV index hour by hour for San Bernardino. When the level is high, it's smart to find some shade.
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