Mount Carmel Weather in September

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

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

September is in the fall / autumn in Mount Carmel and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 14°C (57°F) is normal.

Mount Carmel weather averages (imperial / metric)
Daytime temperature 26.8°C 80.2°F
Nightly temperature 14.1°C 57.3°F
Average temperature 20.4°C 68.7°F
Daily sunshine 8.9 hrs
Avg rainfall 77 mm 3 ins
Rainy days 8 days
Sea temperature 22.1°C 71.8°F
Humidity 73%
Windspeed 11.9kph 7 mph

On average September is the 4th driest month of the year in Mount Carmel with around 77mm 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 8.9 hours of sunshine per day.

September temperatures in Mount Carmel

Mount Carmel average temperature in September

September rainfall

Mount Carmel average rain in September

September hourly sunshine

Mount Carmel 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 Mount Carmel 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

Mount Carmel weather stats

Mount Carmel weather statistics
Hottest month: July 30.8°C 87.4°F
Driest month: February 71mm 2.8ins
Sunniest month: July 11hrs
Coldest month: January 2.6°C 36.7°F
Wettest month: May 125mm 4.9ins
Map showing location of Mount Carmel (38.41088, -87.76142) Mount Carmel map pin © Google

Locations nearby

Top United States locations