Rapid City Weather in September

What's the weather like in Rapid City (Michigan) in September 2024?

The climate in Rapid City during September can be summarized as mild and a little damp.

September is in the fall / autumn in Rapid City and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 8°C (47°F) is normal.

Rapid City weather averages (imperial / metric)
Daytime temperature 20°C 68°F
Nightly temperature 8.2°C 46.8°F
Average temperature 14.1°C 57.4°F
Daily sunshine 6.8 hrs
Avg rainfall 94 mm 3.7 ins
Rainy days 12 days
Sea temperature 17.1°C 62.7°F
Humidity 79%
Windspeed 13.3kph 8 mph

On average September is the wettest month of the year in Rapid City with around 94mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.8 hours of sunshine per day.

September temperatures in Rapid City

Rapid City average temperature in September

September rainfall

Rapid City average rain in September

September hourly sunshine

Rapid City 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 Rapid City in September 2024.