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

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.

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 summer heat and humidity can lead to dangerous conditions in Southwest Florida, even for our four-legged friends.

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 ...

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 ...

That feels-like temperature can come in the form of wind chill or heat index, so similar scenes can play out during the dog days of summer. The amount of moisture in the air–or humidity–can ...

Humidity in Houston is often discussed due to its impact on how the weather feels, with humidity referring to the water vapor ...

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.