UV Index / United States / San Francisco
UV Index in San Francisco
Current UV index, monthly UV averages, and a practical tanning guide.
Live UV index
Live conditions are temporarily unavailable. Monthly UV averages are shown below.
Coordinates: 37.77, -122.42
Monthly UV index — San Francisco
Jan2
Feb4
Mar6
Apr8
May9
Jun10
Jul10
Aug9
Sep7
Oct5
Nov3
Dec2
Best months for tanning
Mar, Apr, May, Jun, Jul, Aug, Sep
Tanning guide
Peak UV in San Francisco is typically 10. Use broad-spectrum SPF, limit midday exposure, and adjust time outdoors to your skin type and current conditions.
Frequently asked questions
What is the UV index in San Francisco today?
Check the live conditions above for the latest local UV reading.
When is UV strongest?
UV is usually strongest around local midday. Cloud cover, season, altitude, and reflection can change exposure.