Table 2.

Exposure Levels Predicted by the UV Index43*

Index ValueExposure LevelTime in Sun
Needed for Burn
0 to 2Minimal1 h
3 to 4Low30–60 min
5 to 6Moderate20–30 min
7 to 9High13–20 min
10 to 15Very high<13 min
  • * These UV effects are on unprotected skin type II, which usually burns easily and tans minimally.