At what point does humidity make it feel warmer or colder than the actual temperature?

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by Jeff Renner

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KING5.com

Posted on May 16, 2011 at 10:50 PM

At what point does humidity make it feel warmer or colder than the actual temperature?

When the dew point reaches or exceeds 57 degrees...or the humidity exceeds 50% at temperatures at/above 77 degrees...the humidity makes it feel warmer than the actual temperature. That's documented in what's called the heat stress index. The reason increasing humidity adds to discomfort is that it slows evaporation of perspiration from the skin, a cooling effect which works to counteract hot weather.

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