Decorah Weather in August

The climate in Decorah during August can be summarized as warm, humid and damp.

August is in the summer in Decorah and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 15°C (58°F) is normal.

On average August is the 3rd wettest month of the year in Decorah with around 106mm 4.2 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 9.9 hours of sunshine per day.

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 Decorah in August 2024.