Heat Index Calculator (Feels-Like Temperature)
Apparent temperature from air temperature and humidity using the NOAA Rothfusz regression.
How to use the Heat Index Calculator
- Enter or select: Air temperature, Relative humidity.
- The results (Heat index, Risk level) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- NOAA Rothfusz regression (in °F)