Decorah Weather in October

The climate in Decorah during October can be summarized as cool and reasonably dry.

October is in the fall / autumn in Decorah and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 16°C (61°F), whilst at night 4°C (39°F) is normal.

On average October is the 6th driest month of the year in Decorah with around 61mm 2.4 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 7 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 October 2025.