Nauvoo Weather in September

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

The climate in Nauvoo during September can be summarized as warm and damp.

September is in the fall / autumn in Nauvoo and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 25°C (78°F), whilst at night 13°C (55°F) is normal.

Nauvoo weather averages (imperial / metric)
Daytime temperature 25.4°C 77.7°F
Nightly temperature 12.8°C 55°F
Average temperature 19.1°C 66.4°F
Daily sunshine 8.3 hrs
Avg rainfall 112 mm 4.4 ins
Rainy days 9 days
Sea temperature 19.6°C 67.4°F
Humidity 72%
Windspeed 14.8kph 9 mph

On average September is the 2nd wettest month of the year in Nauvoo with around 112mm 4.4 inches of rain making it a 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 8.3 hours of sunshine per day.

September temperatures in Nauvoo

Nauvoo average temperature in September

September rainfall

Nauvoo average rain in September

September hourly sunshine

Nauvoo 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 Nauvoo 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

Nauvoo weather stats

Nauvoo weather statistics
Hottest month: July 30.4°C 86.7°F
Driest month: February 30mm 1.2ins
Sunniest month: July 10.9hrs
Coldest month: January -0.6°C 30.9°F
Wettest month: July 113mm 4.4ins
Map showing location of Nauvoo (40.55004, -91.38487) Nauvoo map pin © Google

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