McLeansboro Weather in September

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

The climate in McLeansboro during September can be summarized as warm, humid and reasonably dry.

September is in the fall / autumn in McLeansboro and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 14°C (56°F) is normal.

McLeansboro weather averages (imperial / metric)
Daytime temperature 27.2°C 80.9°F
Nightly temperature 13.5°C 56.2°F
Average temperature 20.3°C 68.5°F
Daily sunshine 8.8 hrs
Avg rainfall 76 mm 3 ins
Rainy days 8 days
Sea temperature 21.6°C 70.9°F
Humidity 72%
Windspeed 12.2kph 8 mph

On average September is the 4th driest month of the year in McLeansboro with around 76mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.8 hours of sunshine per day.

September temperatures in McLeansboro

McLeansboro average temperature in September

September rainfall

McLeansboro average rain in September

September hourly sunshine

McLeansboro 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 McLeansboro 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

McLeansboro weather stats

McLeansboro weather statistics
Hottest month: July 31.3°C 88.3°F
Driest month: January 68mm 2.7ins
Sunniest month: July 11hrs
Coldest month: January 3.3°C 37.9°F
Wettest month: May 117mm 4.6ins
Map showing location of McLeansboro (38.09338, -88.53561) McLeansboro map pin © Google

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