September weather forecast
Whitewood, SD

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Weather in September

September, the first month of the autumn in Whitewood, is still a warm month, with an average temperature ranging between max 73.8°F (23.2°C) and min 53.4°F (11.9°C).

Temperature

In Whitewood, the average high-temperature in September gently drops from a warm 82.6°F (28.1°C) in August to a still moderately hot 73.8°F (23.2°C). In Whitewood, the expected average low-temperature for September is a fresh 53.4°F (11.9°C).

Humidity

August and September, with an average relative humidity of 49%, are the least humid months in Whitewood.

Rainfall

In Whitewood, in September, it is raining for 9 days, with typically 0.83" (21mm) of accumulated precipitation. In Whitewood, during the entire year, the rain falls for 126.3 days and collects up to 16.77" (426mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. 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 Whitewood, during the entire year, snow falls for 62.1 days and aggregates up to 36.26" (921mm) of snow.

Daylight

In Whitewood, South Dakota, the average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:18 am and sunset at 7:30 pm. On the last day of September, in Whitewood, sunrise is at 6:52 am and sunset at 6:36 pm MDT.

Sunshine

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

UV index

In Whitewood, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 4 in September suggests the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What are the temperatures in Whitewood in September?

In September, in Whitewood, the average high-temperature is 73.8°F (23.2°C), and the average low-temperature is 53.4°F (11.9°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 82.4°F (28°C).

What is the least humid month in Whitewood?

The months with the lowest humidity in Whitewood are August and September, with an average relative humidity of 49%.

What is the average humidity in September in Whitewood?

In September, the average relative humidity in Whitewood is 49%.

How many days does it rain in September in Whitewood?

In Whitewood, during September, the rain falls for 9 days and regularly aggregates up to 0.83" (21mm) of precipitation.

When does it start snowing in Whitewood?

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

What is the average length of the day in September in Whitewood?

In Whitewood, the average day length in September is 12h and 30min.

When is the sunrise / sunset in September in Whitewood?

On the first day of September, sunrise is at 6:18 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:36 pm MDT.

How many hours of sunshine does Whitewood have in September?

The average sunshine duration in September in Whitewood, South Dakota, is 10.4h.

What is the UV index reading in September in Whitewood?

In September, the average daily maximum UV index in Whitewood, South Dakota, is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Whitewood, SD

Average temperature in September - Whitewood, 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).

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Average pressure in September
Whitewood, SD

Average pressure in September - Whitewood, 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).

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Average wind speed in September
Whitewood, SD

Average wind speed in September - Whitewood, 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).

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Average humidity in September
Whitewood, SD

Average humidity in September - Whitewood, 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%).

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Average rainfall in September
Whitewood, SD

Average rainfall in September - Whitewood, 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").

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Average rainfall days in September
Whitewood, SD

Average rainfall days in September - Whitewood, 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).

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Average snowfall in September
Whitewood, SD

Average snowfall in September - Whitewood, 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").

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Average snowfall days in September
Whitewood, SD

Average snowfall days in September - Whitewood, 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).

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

Average daylight in September / Average sunshine in September - Whitewood, SD
  • Average daylight in September: 12h and 3min

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 2min

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).

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Average sunshine days in September
Whitewood, SD

Average sunshine days in September - Whitewood, 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).

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Average UV index in September
Whitewood, SD

Average UV index in September - Whitewood, 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
Whitewood, SD

Average cloud cover in September - Whitewood, 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).

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Average visibility in September
Whitewood, SD

Average visibility in September - Whitewood, 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).

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Whitewood, South Dakota, USA

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