September weather forecastSturgis, SD
September
Weather in September
September marks the commencement of autumn in Sturgis, South Dakota. The weather conditions change remarkably in comparison to the peak summer month of August. Rainfall lowers to a minor 0.83" (21mm), qualifying September as the month with the least precipitation. The first fall leaves appear, while temperatures mellow out, providing a pleasant atmosphere. As September concludes, it hands over to October with a further reduction in temperature and an expected rise in rainfall.Temperature
The move into September indicates a slight reduction in the average high-temperature, down from August's 82.6°F (28.1°C) to a still warm 73.8°F (23.2°C). In Sturgis, the nighttime temperature averages to a fresh 53.4°F (11.9°C) during September.Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 49%.Rainfall
In Sturgis, in September, it is raining for 9 days, with typically 0.83" (21mm) of accumulated precipitation. Throughout the year, there are 126.3 rainfall days, and 16.77" (426mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 62.1 snowfall days, and 36.26" (921mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:17 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:35 pm MDT.
Sunshine
The average sunshine in September is 10.4h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Act with care - Obligation to protect against skin and eye damage is highlighted. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sturgis, SD
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.2°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure in September
Sturgis, SD
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Sturgis, SD
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).
Average humidity in September
Sturgis, SD
- Average humidity in September: 49%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (49%).
Average rainfall in September
Sturgis, SD
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Sturgis, SD
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is December (5.8 days).
Average snowfall in September
Sturgis, SD
- Average snowfall in September: 0.04"
The month with the highest snowfall is April (8.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Sturgis, SD
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (12.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Sturgis, SD
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 10h and 24min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in September
Sturgis, SD
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in September
Sturgis, SD
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Sturgis, SD
- Average cloud cover in September: 18
The months with the most cloud cover are February and April (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Sturgis, SD
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
