September weather forecast
Edgemont, SD

Weather in September

The first month of the autumn, September, is still a warm month in Edgemont, South Dakota, with an average temperature fluctuating between 75.2°F (24°C) and 54°F (12.2°C).

Temperature

In Edgemont, the average high-temperature in September marginally drops from a warm 84°F (28.9°C) in August to a still moderately hot 75.2°F (24°C). In September, the average low-temperature is 54°F (12.2°C).

Humidity

In September, the average relative humidity is 48%.

Rainfall

In Edgemont, during 9.3 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Edgemont, South Dakota, during the entire year, the rain falls for 115.8 days and collects up to 16.61" (422mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Edgemont. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Edgemont, during the entire year, snow falls for 49.2 days and aggregates up to 23.19" (589mm) of snow.

Daylight

The average length of the day in September in Edgemont is 12h and 29min.
On the first day of the month, sunrise is at 6:19 am and sunset at 7:30 pm. On the last day of September, in Edgemont, sunrise is at 6:51 am and sunset at 6:38 pm MDT.

Sunshine

The average sunshine in September in Edgemont is 10.4h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in September in Edgemont?

In September, the average relative humidity in Edgemont, South Dakota, is 48%.

How much does it rain in Edgemont in September?

In Edgemont, South Dakota, during September, the rain falls for 9.3 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When does it start snowing in Edgemont?

September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

How many hours of daylight does Edgemont have in September?

In September, the average day length is 12h and 29min.

When is the sunrise / sunset in September in Edgemont?

On the first day of September in Edgemont, South Dakota, sunrise is at 6:19 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:38 pm MDT.

How many hours of sunshine does Edgemont have in September?

In Edgemont, South Dakota, the average sunshine duration in September is 10.4h.

What is the UV index intensity in September in Edgemont?

The average daily maximum UV index in September in Edgemont is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Edgemont, SD

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).

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Average pressure in September
Edgemont, SD

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).

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Average wind speed in September
Edgemont, SD

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).

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Average humidity in September
Edgemont, SD

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%).

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Average rainfall in September
Edgemont, SD

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").

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Average rainfall days in September
Edgemont, SD

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).

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Average snowfall in September
Edgemont, SD

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").

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Average snowfall days in September
Edgemont, SD

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).

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Average daylight in September /
Average sunshine in September
Edgemont, SD

Average daylight in September / Average sunshine in September - Edgemont, SD
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 20min).
The month with the shortest days is December (Average daylight: 9h and 2min).

  • 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).

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Average sunshine days in September
Edgemont, SD

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).

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Average UV index in September
Edgemont, SD

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).

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Average cloud cover in September
Edgemont, SD

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).

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Average visibility in September
Edgemont, SD

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).

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