Heat Index Calculator
Heat Index =
The Heat Index, also known as the apparent temperature, measures how hot it feels in the shade (or at night) with a light breeze (6 mph). Exposure to full sun can add up to 15F to the Heat Index value. Lighter breezes or calm air add to the Heat Index; while stronger winds make it feel cooler.
Enter the temperature and relative humidity; as soon as either one is changed, the heat index temperature is calculated.
This uses the official equations used by the [http://www.hpc.ncep.noaa.gov/html/heatindex.shtml|US National Weather Service].
Contributed by Tony Colley; re-written by Infinity Softworks
What's the heat index if temperature is 80°F and humidity is 50%?
- Temperature: 80°F
- Humidity%: 50
Heat index is 81°F.