The heat index was developed in 1979 in order to create a simple chart that people can use to determine when heat gain will ...

It was very hot Saturday and definitely humid, yet it was possible to find enjoyment in the blue sky, the drifting clouds and ...

Sometimes the temperature outside feels warmer than it is, and there's a reason. Here's a breakdown of the heat index.

The heat index is a measurement that considers both air temperature and humidity to determine how hot it actually feels to ...

The heat index tells us that 88 degrees with 40 percent humidity feels like 88 degrees, and while there is risk there if you’re out in the sun being active for a long time, it’s not a huge deal.

I was on vacation playing with a grandchild during last week’s heat dome, so I didn’t pay much attention to the details. Now ...

AccuWeather's RealFeel® Temperature is the only authentic formula-based metric—unlike 'Feels Like,' which lacks scientific credibility.Request an interview with an AccuWeather expert ...

Officially in Fond du Lac Saturday, the heat index hit 102 degrees. This came with an air temperature of 91 degrees and a ...

On one recent afternoon, the National Weather Service recorded an air temperature of 111 and a relative humidity of 4 percent at its official observation site, but a heat index of only 104 degrees.

For example, an air temperature at 85°F with a dew point of 70°F, or 63% relative humidity will actually feel like 90°F. This new value is considered to be the heat index.

The heat index is a measure of how hot the air feels by combining the temperature and the relative humidity.. In conditions like what Illinois is seeing this week, the air temperature will be in ...