Chicago Weather in October

What's the weather like in Chicago (Illinois) in October 2024?

The climate in Chicago during October can be summarized as mild and reasonably dry.

October is in the fall / autumn in Chicago and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 6°C (43°F) is normal.

Chicago weather averages (imperial / metric)
Daytime temperature 17.2°C 62.9°F
Nightly temperature 6.1°C 42.9°F
Average temperature 11.6°C 52.9°F
Daily sunshine 6.7 hrs
Avg rainfall 68 mm 2.7 ins
Rainy days 9 days
Sea temperature 14.3°C 57.7°F
Humidity 70%
Windspeed 17.3kph 11 mph

On average October is the 5th driest month of the year in Chicago with around 68mm 2.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.7 hours of sunshine per day.

October temperatures in Chicago

Chicago average temperature in October

October rainfall

Chicago average rain in October

October hourly sunshine

Chicago average rain in October

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Chicago in October 2024.