September weather forecastEdgemont, SD
September
Weather in September
September in Edgemont brings a noticeable cooling of temperature, marking the transition from summer to autumn. This period sees a reduction in rainfall and a noticeable increase in wind speed. The decreased daylight hours and the dropping temperatures hint at the forthcoming fall. On an exception, September witnesses an unexpected snowfall of 0.04" (1mm) after a brief absence during the summer months. As the average high temperature drops to 75.2°F (24°C), residents prepare for the colours of fall and the chilly air it brings.Temperature
Edgemont's September weather shows a modest shift in high-temperatures, falling from August's warm 84°F (28.9°C) to a still moderately hot 75.2°F (24°C). Edgemont, during September, witnesses an average low-temperature of 54°F (12.2°C).Humidity
In September, the average relative humidity is 48%.Rainfall
In September, the rain falls for 9.3 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 115.8 rainfall days, and 16.61" (422mm) 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 49.2 snowfall days, and 23.19" (589mm) of snow is accumulated.Daylight
In September, the average length of the day in Edgemont is 12h and 29min.On the first day of September, sunrise is at 6:20 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:37 pm MDT.
Sunshine
The average sunshine in September in Edgemont is 10.4h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Edgemont, SD
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (63.9°F).
The coldest months (with the lowest average low temperature) are February and December (18.5°F).
Average pressure in September
Edgemont, SD
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Edgemont, SD
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in September
Edgemont, SD
- Average humidity in September: 48%
The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is August (47%).
Average rainfall in September
Edgemont, SD
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.87").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Edgemont, SD
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is December (3.5 days).
Average snowfall in September
Edgemont, SD
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Edgemont, SD
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Edgemont, SD
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 10h and 24min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Edgemont, SD
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is December (21.4 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Edgemont, 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
Edgemont, SD
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Edgemont, 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).
