Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In the transition to September, Big Stone City observes a minor drop in the average high-temperature, shifting from a moderately hot 80.8°F (27.1°C) in August to an agreeable 73°F (22.8°C). In the month of September, Big Stone City records a consistent average low-temperature of 52.7°F (11.5°C).Humidity
In Big Stone City, the average relative humidity in September is 67%.Rainfall
In Big Stone City, in September, during 9.4 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, there are 106.9 rainfall days, and 19.84" (504mm) of precipitation is accumulated.Snowfall
In Big Stone City, snow does not fall in June through September.Daylight
In September, the average length of the day in Big Stone City is 12h and 31min.On the first day of the month, sunrise is at 6:48 am and sunset at 8:02 pm. On the last day of September, in Big Stone City, sunrise is at 7:23 am and sunset at 7:07 pm CDT.
Sunshine
In Big Stone City, the average sunshine in September is 9h.UV index
In September, the average daily maximum UV index in Big Stone City 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 daily high UV index of 4 in September translates into this advice:
Adopt protective measures - It is advised to guard against sun damage. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What are the temperatures in Big Stone City in September?
What is the average humidity in September in Big Stone City?
How much does it rain in Big Stone City in September?
When it does not snow in Big Stone City?
Does it snow in Big Stone City in September?
What is the average length of the day in September in Big Stone City?
What time are sunrise and sunset in September in Big Stone City?
How long on average sun shines in September in Big Stone City?
How high is the UV index in September in Big Stone City?
Average temperature in September
Big Stone City, SD
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (19.6°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).
Average pressure in September
Big Stone City, SD
- Average pressure in September: 29.98"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Big Stone City, SD
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Big Stone City, SD
- Average humidity in September: 67%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Big Stone City, SD
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is June (3.07").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in September
Big Stone City, SD
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in September
Big Stone City, SD
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Big Stone City, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Big Stone City, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Big Stone City, SD
- Average sunshine days in September: 18.2 days
The months with the most sunshine days are October and November (18.7 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Big Stone City, SD
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Big Stone City, SD
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 25).
Average visibility in September
Big Stone City, 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).
Big Stone City, South Dakota, USA
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