September weather forecast and climate
Quinn, SD

Weather in September

The first month of the autumn, September, is also a moderately hot month in Quinn, South Dakota, with average temperature fluctuating between 77.5°F (25.3°C) and 58.3°F (14.6°C).

Temperature

In September, the average high-temperature drops, from a hot 87.1°F (30.6°C) in August, to a warm 77.5°F (25.3°C). In September, the average low-temperature is 58.3°F (14.6°C).

Humidity

September is the least humid month, with an average relative humidity of 47%.

Rainfall

In September, the rain falls for 8.5 days. Throughout September, 0.91" (23mm) of precipitation is accumulated. Throughout the year, in Quinn, there are 95.3 rainfall days, and 13.74" (349mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Quinn.

Daylight

In Quinn, the average length of the day in September is 12.5h.

Sunshine

In Quinn, the average sunshine is 9.9h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 5 transform into the following instructions:
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.
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FAQ

What is the least humid month in Quinn?

With an average relative humidity of 47%, September is the least humid month.

What is the average humidity in September in Quinn?

In September, the average relative humidity in Quinn, South Dakota, is 47%.

How much does it rain in Quinn in September?

In Quinn, in September, during 8.5 rainfall days, 0.91" (23mm) of precipitation is typically accumulated.

When it does not snow in Quinn?

June through September are months without snowfall in Quinn, South Dakota.

Does it snow in Quinn in September?

In Quinn, South Dakota, in September, it doesn't snow. In October, it regularly snows.

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

In September, the average length of the day in Quinn, South Dakota, is 12.5h.

How many hours of sunshine does Quinn have in September?

The average sunshine in September in Quinn is 9.9h.

What is the UV index reading in September in Quinn?

In Quinn, South Dakota, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Quinn, SD

Average temperature in September - Quinn, SD
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in September: 58.3°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

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Average pressure in September
Quinn, SD

Average pressure in September - Quinn, SD
  • Average pressure in September: 29.94"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in September
Quinn, SD

Average wind speed in September - Quinn, SD
  • Average wind speed in September: 11.1mph

The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is February (10.1mph).

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Average humidity in September
Quinn, SD

Average humidity in September - Quinn, SD
  • Average humidity in September: 47%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is September (47%).

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Average rainfall in September
Quinn, SD

Average rainfall in September - Quinn, SD
  • Average rainfall in September: 0.91"

The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.39").

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Average rainfall days in September
Quinn, SD

Average rainfall days in September - Quinn, SD
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (2.6 days).

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Average snowfall in September
Quinn, SD

Average snowfall in September - Quinn, SD
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.15").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Quinn, SD

Average snowfall days in September - Quinn, SD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (8.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Quinn, SD
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in September: 9.9h

The month with the most sunshine is August (Average sunshine: 11.7h).
Months with the least sunshine are January and February (Average sunshine: 5.2).

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Average sunshine days in September
Quinn, SD

Average sunshine days in September - Quinn, SD
  • Average sunshine days in September: 18.8 days

The month with the most sunshine days is December (21.1 days).
Months with the least sunshine days are April and June (14.1 days).

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Average UV index in September
Quinn, SD

Average UV index in September - Quinn, SD
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Quinn, SD

Average cloud cover in September - Quinn, SD
  • Average cloud cover in September: 19

The month with the most cloud cover is January (Cloud cover 46).
Months with the least cloud cover are July and August (Cloud cover 18).

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Average visibility in September
Quinn, SD

Average visibility in September - Quinn, SD
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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