The climate in Spearfish during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Spearfish and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 6°C (43°F) is normal.
Daytime temperature | 21.6°C 70.8°F |
---|---|
Nightly temperature | 6.3°C 43.3°F |
Average temperature | 13.9°C 57°F |
Daily sunshine | 9.2 hrs |
Avg rainfall | 32 mm 1.3 ins |
Rainy days | 8 days |
Sea temperature | 15.7°C 60.3°F |
Humidity | 55% |
Windspeed | 17.6kph 11 mph |
On average September is the 6th wettest month of the year in Spearfish with around 32mm 1.3 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 9.2 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 Spearfish in September 2024.
Best places to visit in September
Hottest month: | July | 28.8°C 83.8°F |
---|---|---|
Driest month: | January | 11mm 0.4ins |
Sunniest month: | August | 10.9hrs |
Coldest month: | January | -0.8°C 30.6°F |
Wettest month: | June | 77mm 3ins |