Heat Index Calculator (NWS Rothfusz)

Get the felt-air temperature from heat and humidity.

Air temperature (°F)Relative humidity (%)

Result

Heat index

113.1 °F

Risk band

Danger

Uses the National Weather Service Rothfusz regression when temp ≥ 80°F and humidity ≥ 40%.

Band: Danger.

Heat-related illness is likely with prolonged exposure. Limit outdoor activity and stay hydrated.

À propos de cet outil

Type air temperature and relative humidity (or dew point) to get the National Weather Service Rothfusz Heat Index with the official warning bands. Targets the r/Heatwave, r/Fitness, and r/running 'is it safe to run outside' thread.

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