WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.

A few days of relief from heat and humidity

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Sunday saw temperatures creep higher around Chicago, peaking at 90° at Midway Airport—the first such reading of the year. Although O’Hare Airport topped out at 87° for Chicago’s official high temperature, it was also its warmest of the year. Hotter temps included 94° at Champaign and 95° at Goshen, Ind. Chicago also escaped a second day of severe weather, as most occurred south or east of the city—including reports of two tornadoes.
Cooler, less humid air sweeps in Monday as west winds trail the exiting heat and humidity to the east. After two warm but less humid days, this front inches back northward and stalls over the Chicago area from Wednesday into the weekend. This system will act as a focus for upcoming thunderstorms, possible from Wednesday through Saturday, with the best chance of needed rain late in that period.