Sioux Falls Weather in August

The climate in Sioux Falls during August can be summarized as warm and reasonably dry.

August is in the summer in Sioux Falls and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (84°F), whilst at night 15°C (59°F) is normal.

On average August is the 4th wettest month of the year in Sioux Falls with around 74mm 2.9 inches of rain making it a reasonably dry 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 10.7 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 Sioux Falls in August 2024.