Chicago Weather In October
Chicago Weather In October continues to cool, although it can be nice more often than not. The normal daily high drops from 70°F in the beginning of the month to 60 by the end of the month, and lows below freezing are possible, as is snow. But those are extremes and rare, most of the time Chicago weather in October ranges between pleasant to crisp.
The swimming season is over now, but golf, running and tennis are still fun on most days.