Some large temperature swings will take place over northern IL and the greater Chicago area the next few days. The temperature change actually started during Thursday as a strong cold front moved through the area during the afternoon. Wind gusts of over 50 mph were reported, with sporadic wind damage also being reported.
Temperatures for Saturday morning will be on the chilly side, with some frost likely over north central IL toward Rockford and DeKalb. The frost will become much more widespread Sunday morning with frost and some freeze conditions expected from the west and north suburbs of Chicago all the way west to the Mississippi river and throughout WI. The first widespread visit of Jack Frost for the fall season. Only areas in the city and northwest IN near the lake should escape the frost. The growing season will effectively end for a good chunk of northern IL. With all the rain the area has received recently, the frost should be quite heavy and coat a lot of objects.
By Monday the center of the cold air will have moved south of the area with temperatures rebounding to near 70, and in the 70s for Tuesday and Wednesday. Next week looks to have very nice October weather with lots of day time sunshine and the mild temperatures.
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