UV Index / U.S. Virgin Islands / St. John
UV Index in St. John
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: 18.34, -64.75
Monthly UV index — St. John
Jan7
Feb7
Mar8
Apr10
May11
Jun12
Jul12
Aug12
Sep11
Oct10
Nov8
Dec7
Best months for tanning
Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
Tanning guide
Peak UV in St. John is typically 12. 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 St. John 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.