wxcalc_WBGT

Wet-bulb Globe Temperature

Category	WBGT °F	WBGT °C	Flag color	Affects	Precautions
1	=<79.9	=<26.6	White
2	80-84.9	26.7-29.3	Green	Working or exercising in direct sunlight will stress your body after 45 minutes.	Take at least 15 minutes of breaks each hour if working or exercising in direct sunlight
3	85-87.9	29.4-31.0	Yellow	Working or exercising in direct sunlight will stress your body after 30 minutes.	Take at least 30 minutes of breaks each hour if working or exercising in direct sunlight
4	88-89.9	31.1-32.1	Red	Working or exercising in direct sunlight will stress your body after 20 minutes.	Take at least 40 minutes of breaks each hour if working or exercising in direct sunlight
5	=>90	=>32.2	Black	Working or exercising in direct sunlight will stress your body after 15 minutes.	Take at least 45 minutes of breaks each hour if working or exercising in direct sunlight