UV Index / United States / San Marcos
UV Index in San Marcos
Current UV index, monthly UV averages, and a practical tanning guide.
Live UV index
UV index: 0 (low) Temperature: 28°C Conditions: Mostly Clear
Coordinates: 29.88, -97.94
Monthly UV index — San Marcos
Jan4
Feb4
Mar6
Apr8
May9
Jun11
Jul11
Aug11
Sep9
Oct8
Nov6
Dec4
Best months for tanning
Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
Tanning guide
Peak UV in San Marcos is typically 11. 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 Marcos 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.