UV Index in St. John
Real-time UV forecast & tanning weather
Current Conditions
Loading live weather data...Weather data by Open-Meteo (CC BY 4.0)
Monthly UV Index in St. John
Average daily maximum UV index by month
| Jan | 7 | High |
| Feb | 7 | High |
| Mar | 8 | Very High |
| Apr | 10 | Very High |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very High |
| Nov | 8 | Very High |
| Dec | 7 | High |
Best Months to Tan in St. John
Based on average UV levels, the best months for tanning in St. John are:
January Great
February Great
March Great
April Excellent
May Excellent
June Excellent
July Excellent
August Excellent
September Excellent
October Excellent
November Great
December Great
Rating based on average monthly UV index
Tanning Guide for St. John
Tanning Tips
UV levels in St. John are high year-round due to its tropical location. Always wear SPF 30+ and limit initial sessions to 15-20 minutes.
Related Guides
Frequently Asked Questions
What is the UV index in St. John right now?
The current UV index in St. John is shown in the live weather section above. UV levels change throughout the day, typically peaking between 11 AM and 2 PM local time.
What is the best month to tan in St. John?
The best months for tanning in St. John are January, February, March, April, May, June, July, August, September, October, November, December, when average UV levels reach 7 or higher.
How long should I tan in St. John?
Tanning time depends on your skin type and the current UV index. For a moderate UV of 10, a person with Skin Type III (medium complexion) can safely tan for about 15 minutes per session. Use our Tanning Calculator for personalized recommendations.
Is it safe to tan in UV index 12?
UV index 12 is classified as Extreme. Extreme — stay in shade during peak hours. Tanning is not recommended without strong protection.
When is the peak UV time in St. John?
UV levels in St. John typically peak between 11:00 AM and 2:00 PM local time. The exact peak depends on the season, cloud cover, and altitude.
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