Chicago Weather in October
United States · 30-year monthly averages
👍 Good time to visit
October in Chicago is mild, with average daytime highs around 18°C (64°F) and nighttime lows near 8°C (46°F). Expect roughly 88mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
Avg high
18°C
64°F
Avg low
8°C
46°F
Rainfall
88mm
moderate
Rainy days
9
days with ≥1mm
🎒 What to pack
- light jacket
- layers for cool evenings
October vs the rest of the year
FAQ
- How hot is Chicago in October?
- October in Chicago is mild, with average daytime highs around 18°C (64°F) and nighttime lows near 8°C (46°F). Expect roughly 88mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
- Does it rain a lot in Chicago in October?
- Chicago sees around 88mm of precipitation in October on average — moderate by global standards.
- Is October a good time to visit Chicago?
- October is a good month to visit Chicago, with generally agreeable conditions.