Frost outlook for Thursday night and Friday night. Low temperatures are expected Thursday night/Friday morning and Friday night/Saturday morning.
The season’s first frost was Saturday, October 22, 2011. Frost covered rooftops and grass, but not garden and landscaping areas near buildings and homes.
The official low for Chicago was 34°F on Saturday, October 22, 2011. The record low for the date in Chicago at O’Hare International Airport is 22°F (1982).
The official low at Chicago Executive Airport was 35°F at 1:51 a.m.
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