San Ramon UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index6.8
- Avg Clouds87%
- Max Temp21.6 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in San Ramon, United States 
will reach a high of 6.8 today. This means a high level of sun exposure. See our tips below to stay safe!
Last checked: 2025-09-11
Hourly Forecast Chart
Today's Safety Tips
Be careful! The sun's rays are strong. Try to stay in the shade between 10 a.m. and 4 p.m. Wear a hat, sunglasses, and reapply SPF 30+ sunscreen every 2 hours.
San Ramon's UV Index
San Ramon has a UV index that varies throughout the year, with the highest levels in summer, often reaching strong to very strong levels around midday. In winter, the UV index is much lower, typically moderate.
Weather Seasons
The weather in San Ramon shows warm, dry summers and mild, wet winters. Summer temperatures often reach into the 80s and 90s Fahrenheit, while winter temperatures usually stay between the 40s and 60s. Rain mostly falls in winter and spring.
San Ramon's Climate
Compared to other parts of California and neighboring states, San Ramon's climate is milder and less extreme. It has fewer hot days than inland areas like Central Valley but more sun and warmth than coastal cities like San Francisco. Neighboring states like Nevada have colder winters.
Hourly UV Index Trend
See the UV index hour by hour for San Ramon. When the level is high, it's smart to find some shade.
- Loading hourly data...