Explore
Everything behind the number
WetBulbTracker is built to be inspected. Dig into our live accuracy and open methodology, run the calculator, read the guides, or check live heat for major U.S. cities.
Open the live mapLive Accuracy
See how our WBGT stacks up against the U.S. National Weather Service — live, in public.
Methodology
Every formula, constant, and assumption behind the number — open for scrutiny.
Calculator
Enter temperature and humidity to compute WBGT, wet bulb, heat index, dew point and more.
Learn
Plain-language guides to heat stress, WBGT, and staying safe when it climbs.
Cities
Live heat stress for dozens of major U.S. cities, at a glance.
Updates
Product news and release notes — what's new on WetBulbTracker.