Chicago, Illinois Local News
Season’s first frost looms as summerlike warmth gives way to chilly temperatures
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October is off to a remarkable sunny start—it’s the sunniest open in nearly half a century, since 1975!
Temperatures warmed several degrees above Wednesday’s levels Thursday afternoon along with a 4th straight day with nearly 100% sunshine.
Even warmer air was prevalent across the Plains with highs well into the 80s, even 90s in some areas, a level 15-30 degrees above normal.
A piece of that warmth arrives in the Chicago area Friday where temperatures are expected to reach the middle 80s.
More record highs occurred across the Southwest Thursday, including an unprecedented 17th straight day in Phoenix.
From summerlike warmth to the coolest weather since last April
Chicago’s temperature roller coaster is headed south following Friday’s unseasonable warmth.
Stationary front draped across the area Saturday afternoon to set up a large temperature spread—from low 60s north to the lower or possibly middle 80s south towards Kankakee and Rensselaer, IN.
Forecast set-up Saturday afternoon
Forecast temperature snapshot
The front is likely to generate a few scattered showers across parts of the area Saturday afternoon.
Chicago’s rain chances into early next week
Chilliest air of the season arrives early next week, including the potential for the first frost across parts of the area well away from Lake Michigan.
Weather Prediction Center highlighted the area where frost/freezing temperatures will be possible
Forecast Monday AM lows
Forecast Tuesday AM lows
Frost/freeze area climatology
Following the season’s coolest air to date early next week, a significant temperature rebound is expected by later next week into the following week.
Forecast 8–14-day temperature trend October 18 through 24
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WGN-TV Tom Skilling Weather Center
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