Temperature =

Humidity% =

Heat Index =

hi =

hi_test =

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.

Temperature

Humidity%

Heat Index

-------------

apparent temperature