UV index today  UV Index

San Ramon UV Index Today

Day Summary

The UV index in San Ramon, United States Flag of United States will reach a high of 9.9 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!

Last checked: 2025-08-01

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 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

UV index

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.

Disclaimer

* The information on this page about the UV index in San Ramon is for educational purposes only. It is not a substitute for professional medical advice. Always consult a doctor for any health concerns.