You think it gets humid in Philadelphia? 'Corn sweat' is causing 90-degree dew points in Iowa
By Brian Donegan
(Brian Donegan)
PHILADELPHIA - The humidity in Philadelphia is no joke during the summer. Many days have dew points in the 70s, indicating an oppressively humid air mass that leads to instant sweat the moment you walk outside. But at least we've never had a 90-degree dew point.
Clarion, Iowa, reported a dew point of 90 degrees Wednesday afternoon at 2:15 p.m. Central time. The air temperature at that time was also 90 degrees, resulting in 100% relative humidity and a heat index of 132 degrees.