Nauvoo Weather in August

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

The climate in Nauvoo during August can be summarized as hot, humid and a little damp.

August is in the summer in Nauvoo and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (85°F), whilst at night 17°C (63°F) is normal.

Nauvoo weather averages (imperial / metric)
Daytime temperature 29.3°C 84.7°F
Nightly temperature 17.1°C 62.8°F
Average temperature 23.2°C 73.8°F
Daily sunshine 9.8 hrs
Avg rainfall 91 mm 3.6 ins
Rainy days 9 days
Sea temperature 20.9°C 69.6°F
Humidity 72%
Windspeed 13.7kph 9 mph

On average August is the 5th wettest month of the year in Nauvoo with around 91mm 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 9.8 hours of sunshine per day.

August temperatures in Nauvoo

Nauvoo average temperature in August

August rainfall

Nauvoo average rain in August

August hourly sunshine

Nauvoo average rain in August

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 August 2025.