San Mateo UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index0.0
- Avg Clouds0%
- Max Temp0 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in San Mateo, California, United States 
will reach a high of 0 today. This means a normal level of sun exposure. See our tips below to stay safe!
Hourly Forecast Chart
Today's Safety Tips
Check the live data above for the current conditions and stay safe in the sun!
San Mateo's UV Index
San Mateo, California typically has a UV index ranging from moderate to high, especially during summer months, with values often between 5 and 9, indicating strong sun exposure at midday.
Weather Seasons
The weather in San Mateo features mild, wet winters and dry, warm summers. Most rainfall occurs between November and March, while summers are usually sunny and foggy mornings are common near the coast.
San Mateo's Climate
Compared to nearby San Francisco and the wider Bay Area, San Mateo is slightly warmer and less foggy. It has a milder climate than inland California cities but is cooler and less rainy than parts of Northern California further north.
Hourly UV Index Trend
See the UV index hour by hour for San Mateo. When the level is high, it's smart to find some shade.
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