Sioux Falls Weather in October

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

October is in the fall / autumn in Sioux Falls and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 16°C (61°F), whilst at night 2°C (36°F) is normal.

On average October is the 6th driest month of the year in Sioux Falls with around 43mm 1.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.3 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 Sioux Falls in October 2025.