September weather forecast
Sturgis, SD

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Weather in September

September marks the commencement of autumn in Sturgis, South Dakota. The weather conditions change remarkably in comparison to the peak summer month of August. Rainfall lowers to a minor 0.83" (21mm), qualifying September as the month with the least precipitation. The first fall leaves appear, while temperatures mellow out, providing a pleasant atmosphere. As September concludes, it hands over to October with a further reduction in temperature and an expected rise in rainfall.

Temperature

With the onset of September, the average high-temperature subtly recedes from August's 82.6°F (28.1°C) to a still warm 73.8°F (23.2°C). Throughout the month of September, Sturgis witnesses an average temperature of 53.4°F (11.9°C).

Humidity

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

Rainfall

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

Snowfall

January through May, September through December are months with snowfall in Sturgis. September is the first month it typically snows in Sturgis. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 62.1 snowfall days, and 36.26" (921mm) of snow is accumulated.

Daylight

In Sturgis, the average length of the day in September is 12h and 30min.
On the first day of September in Sturgis, sunrise is at 6:17 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:35 pm MDT.

Sunshine

In Sturgis, the average sunshine in September is 10.4h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: A daily high UV index of 4 in September leads to these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

What is the usual temperature for Sturgis in September?

Sturgis in September has an average high-temperature of 73.8°F (23.2°C) and an average low-temperature of 53.4°F (11.9°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in August is calculated to be 82.4°F (28°C).

What is the least humid month in Sturgis?

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

What is the average humidity in September in Sturgis?

In September, the average relative humidity is 49%.

How many days does it rain in September in Sturgis?

In September, in Sturgis, the rain falls for 9 days. Throughout September, 0.83" (21mm) of precipitation is accumulated.

When does it start snowing in Sturgis?

September is the first month it typically snows in Sturgis. 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 Sturgis?

In Sturgis, South Dakota, the average day length in September is 12h and 30min.

When is the sunrise / sunset in September in Sturgis?

In September, on the first day of the month, sunrise is at 6:17 am and sunset at 7:29 pm. On the last day of the month, in Sturgis, sunrise is at 6:51 am and sunset at 6:35 pm MDT.

How long on average sun shines in September in Sturgis?

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

How high is the UV index in September in Sturgis?

The average daily maximum UV index in September in Sturgis, South Dakota, is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
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
Sturgis, SD

Average temperature in September - Sturgis, 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
Sturgis, SD

Average pressure in September - Sturgis, 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
Sturgis, SD

Average wind speed in September - Sturgis, 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
Sturgis, SD

Average humidity in September - Sturgis, 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
Sturgis, SD

Average rainfall in September - Sturgis, 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
Sturgis, SD

Average rainfall days in September - Sturgis, 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
Sturgis, SD

Average snowfall in September - Sturgis, 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
Sturgis, SD

Average snowfall days in September - Sturgis, 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
Sturgis, SD

Average daylight in September / Average sunshine in September - Sturgis, 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
Sturgis, SD

Average sunshine days in September - Sturgis, 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
Sturgis, SD

Average UV index in September - Sturgis, 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
Sturgis, SD

Average cloud cover in September - Sturgis, 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
Sturgis, SD

Average visibility in September - Sturgis, 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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Sturgis, South Dakota, USA

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