Shelbyville Weather in August

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

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

August is in the summer in Shelbyville and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 30°C (85°F), whilst at night 17°C (63°F) is normal.

Shelbyville weather averages (imperial / metric)
Daytime temperature 29.5°C 85°F
Nightly temperature 17.2°C 62.9°F
Average temperature 23.3°C 73.9°F
Daily sunshine 10 hrs
Avg rainfall 82 mm 3.2 ins
Rainy days 8 days
Sea temperature 22.4°C 72.3°F
Humidity 73%
Windspeed 12.6kph 8 mph

On average August is the 5th driest month of the year in Shelbyville with around 82mm 3.2 inches of rain making it a a little damp 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 10 hours of sunshine per day.

August temperatures in Shelbyville

Shelbyville average temperature in August

August rainfall

Shelbyville average rain in August

August hourly sunshine

Shelbyville 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 Shelbyville in August 2025.

Other monthly averages

Best places to visit in August

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Shelbyville weather stats

Shelbyville weather statistics
Hottest month: July 30.4°C 86.7°F
Driest month: January 50mm 2ins
Sunniest month: July 10.9hrs
Coldest month: January 1.1°C 34°F
Wettest month: July 103mm 4.1ins
Map showing location of Shelbyville (39.40643, -88.79007) Shelbyville map pin © Google

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