September weather forecast
Newell, SD

Weather in September

The first month of the autumn, September, is still a warm month in Newell, South Dakota, with an average temperature varying between 73.8°F (23.2°C) and 53.4°F (11.9°C).

Temperature

In Newell, the average high-temperature in September slightly decreases from 82.6°F (28.1°C) in August to a still moderately hot 73.8°F (23.2°C). In September, in Newell, South Dakota, the average low-temperature is 53.4°F (11.9°C).

Humidity

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

Rainfall

In September, the rain falls for 9 days. Throughout September, 0.83" (21mm) of precipitation is accumulated. Throughout the year, there are 126.3 rainfall days, and 16.77" (426mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Newell 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 Newell, South Dakota, during the entire year, snow falls for 62.1 days and aggregates up to 36.26" (921mm) of snow.

Daylight

In September, the average length of the day in Newell, South Dakota, is 12h and 30min.
On the first day of September in Newell, sunrise is at 6:16 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:36 pm MDT.

Sunshine

In September, the average sunshine is 10.4h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What are the least humid months in Newell?

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

What is the average humidity in September in Newell?

In September, the average relative humidity is 49%.

How much does it rain in Newell in September?

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

When does it start snowing in Newell?

September is the first month it typically snows in Newell, South Dakota. 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 Newell?

The average day length in September in Newell is 12h and 30min.

What time are sunrise and sunset in September in Newell?

In September, on the first day of the month, sunrise is at 6:16 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:36 pm MDT.

How long on average sun shines in September in Newell?

In September, the average sunshine duration is 10.4h.

What is the UV index reading in September in Newell?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Newell, SD

Average temperature in September - Newell, 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
Newell, SD

Average pressure in September - Newell, 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
Newell, SD

Average wind speed in September - Newell, 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
Newell, SD

Average humidity in September - Newell, 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
Newell, SD

Average rainfall in September - Newell, 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
Newell, SD

Average rainfall days in September - Newell, 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
Newell, SD

Average snowfall in September - Newell, 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
Newell, SD

Average snowfall days in September - Newell, 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
Newell, SD

Average daylight in September / Average sunshine in September - Newell, SD
  • Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 31min).
The month with the shortest days is December (Average daylight: 8h and 52min).

  • Average sunshine in September: 10h and 24min

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
Newell, SD

Average sunshine days in September - Newell, 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
Newell, SD

Average UV index in September - Newell, 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
Newell, SD

Average cloud cover in September - Newell, 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
Newell, SD

Average visibility in September - Newell, 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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