Yorkville Weather in September

What's the weather like in Yorkville (Illinois) in September 2025?

The climate in Yorkville during September can be summarized as mild and a little damp.

September is in the fall / autumn in Yorkville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (76°F), whilst at night 12°C (53°F) is normal.

Yorkville weather averages (imperial / metric)
Daytime temperature 24.2°C 75.5°F
Nightly temperature 11.5°C 52.6°F
Average temperature 17.8°C 64°F
Daily sunshine 8.2 hrs
Avg rainfall 92 mm 3.6 ins
Rainy days 9 days
Sea temperature 19.4°C 66.8°F
Humidity 72%
Windspeed 14.8kph 9 mph

On average September is the 6th wettest month of the year in Yorkville with around 92mm 3.6 inches of rain making it a a little damp 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 8.2 hours of sunshine per day.

September temperatures in Yorkville

Yorkville average temperature in September

September rainfall

Yorkville average rain in September

September hourly sunshine

Yorkville average rain in September

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 Yorkville in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Yorkville weather stats

Yorkville weather statistics
Hottest month: July 28.9°C 84°F
Driest month: February 34mm 1.3ins
Sunniest month: July 10.9hrs
Coldest month: January -1.9°C 28.6°F
Wettest month: June 106mm 4.2ins
Map showing location of Yorkville (41.64114, -88.44729) Yorkville map pin © Google

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