Heat Index: Wet Bulb

Heat Index: Wet Bulb helps you avoid heat-related illness by showing clear heat conditions and forecasts — with no ads. Designed exclusively for users in the United States. The app uses a U.S.-only data service, so data is not available outside the United States. Key features Current Heat Index and risk level guidance (OSHA/NIOSH-style scale) Current Wet Bulb / WBGT categories (when available) Home Screen widget for at-a-glance Heat Index and WBGT Hourly forecasts with 48-hour trend charts