Hot Springs Weather in September

What's the weather like in Hot Springs (South Dakota) in September 2025?

The climate in Hot Springs during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Hot Springs and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 7°C (44°F) is normal.

Hot Springs weather averages (imperial / metric)
Daytime temperature 25.8°C 78.4°F
Nightly temperature 6.7°C 44°F
Average temperature 16.2°C 61.2°F
Daily sunshine 9.5 hrs
Avg rainfall 35 mm 1.4 ins
Rainy days 7 days
Sea temperature 16.3°C 61.3°F
Humidity 55%
Windspeed 17.6kph 11 mph

On average September is the 6th wettest month of the year in Hot Springs with around 35mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.5 hours of sunshine per day.

September temperatures in Hot Springs

Hot Springs average temperature in September

September rainfall

Hot Springs average rain in September

September hourly sunshine

Hot Springs average rain in September

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 Hot Springs in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Hot Springs weather stats

Hot Springs weather statistics
Hottest month: July 31.4°C 88.5°F
Driest month: January 8mm 0.3ins
Sunniest month: August 11.2hrs
Coldest month: January 2.7°C 36.9°F
Wettest month: May 72mm 2.8ins
Map showing location of Hot Springs (43.43165, -103.47436) Hot Springs map pin © Google

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