We’ve come to expect blazing heat and oppressive humidity in a typical Chicago July, but you would never know it by looking at the temperatures and humidities that have prevailed across the city recently: three consecutive days with afternoon readings in the 70s coupled with pleasantly low relative humidity.
All of this has come to us compliments of a sprawling high pressure system that has delivered to Chicago and the Midwest fair, cool and dry Canadian air relatively devoid of pollutants.
The air mass, however, is “aging” and, starting today, its pleasant characteristics will give way to a gradual increase in temperatures and moisture in upcoming days—each day being incrementally warmer and more humid than the day before.
Showers and thunderstorms eventually return to the area, possibly by late Sunday.
-Richard Koeneman, WGN-TV Meteorologist
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
