Weather · Chicago, United States
Chicago Weather in August
August in Chicago averages 27°C by day and 19°C at night, with about 132mm of rain. That makes it one of the best months to visit.
Avg high
27°C
81°F
Avg low
19°C
66°F
Rainfall
132mm
#3 wettest of 12
What to pack
Summer clothes by day; a light layer for evenings. Bring a compact umbrella for the odd shower.
Timing a trip around the weather? A Local Friend in Chicago builds it around the season for you.