October is one of the best months to be in Chicago, though the weather can be a bit unpredictable. You might visit and find temps in the 90′s or above (as it was one year for the Chicago Marathon in mid-October) or that a cold front has moved in and the thermometer reads below 40. But it’s most likely that you’ll find days that are pleasant and sunny with a slight crispness to the air.
The average October high is 64°F while the average low is 46°F. Your best bet is to pack layers; you can’t go wrong with jeans and a few short-sleeved tops, a cardigan or light jacket and a few long-sleeve sweaters. Women can also opt for dresses that they can pair with tights and boots if it gets colder, or with flats if it’s warm.
There are so many things to do in Chicago in October. The farmer’s markets are in their last few days of being outdoors, Daly Plaza comes alive as Franken Plaza for Halloween, and everyone is out and about savoring the last nice days of the season. You can visit the zoo, take sightseeing cruise or tour, or dine alfresco in pleasant weather without the crowds.