National Weather Service United States Department of Commerce

Wet Bulb Globe Temperature

(Prototype -- not official -- availability not guaranteed)


Today's WBGT Forecast   |   5-Day WBGT Forecast
* (Experimental) National WBGT Display *


The Wet Bulb Globe Temperature (WBGT) is a measure of heat stress in direct sunlight, which is based on temperature, humidity, wind speed, sun angle, and cloud cover (solar radiation). This differs from the heat index, which is based only on temperature and humidity and is calculated for shady areas. Scroll down for latest observations and forecasts.









WBGT     vs     Heat Index


What's the Difference?


Compare the WBGT and Heat Index