The best time to visit Chicago
Month-by-month climate averages for Chicago, IL, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Chicago is usually May, June and September, when daytime highs sit in the pleasant 60-78°F range and the heaviest August rain is behind you.
Chicago is warmest in July (highs near 79°F) and coldest in January (lows around 20°F), with roughly 42 inches of precipitation across the year and August the wettest month. The sweet spot for most visitors is May, June and September. Expect overnight frost in January, February, March and December.
These are long-run averages. For the actual days you are travelling, check the live Chicago forecast - and note how much the models agree, because that tells you how much to trust it.
Chicago weather by month
what to expect in Chicago through the year, 1991-2020 averagesHere is Chicago's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to Chicago by season.