September weather forecastBrandon, SD
September
Weather in September
Weather in September significantly differs from the hot summer months in Brandon. The city enters the fall season, with considerably cooler temperatures setting in. The fall foliage in and around the city is a delightful sight, drawing visitors from far and wide. The day is marked by 8.8 hours of sunshine, turning progressively shorter as the month advances towards October. The transition to October brings a more pronounced shift in the weather, preparing Brandon for the winter ahead.Temperature
Brandon, South Dakota, records a mild change in average high-temperature during September, easing from 80.8°F (27.1°C) in August to a still moderately hot 74.1°F (23.4°C). Brandon's average low-temperature for the month of September records at a cool 53.2°F (11.8°C).Humidity
In September, the average relative humidity is 70%.Rainfall
In September, the rain falls for 10.8 days. Throughout September, 1.93" (49mm) of precipitation is accumulated. In Brandon, during the entire year, the rain falls for 112.2 days and collects up to 20.67" (525mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Brandon, the average length of the day in September is 12h and 29min.On the first day of September in Brandon, sunrise is at 6:50 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:08 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Brandon, SD
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in September
Brandon, 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
Brandon, SD
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in September
Brandon, SD
- Average humidity in September: 70%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Brandon, SD
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in September
Brandon, SD
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (2.2 days).
Average snowfall in September
Brandon, SD
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Brandon, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Brandon, SD
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Brandon, SD
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Brandon, 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, February, October, November and December (UV index 2).
Average cloud cover in September
Brandon, SD
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Brandon, SD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
