September weather forecast
Glad Valley, SD

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Weather in September

The first month of the autumn, September, is still a warm month in Glad Valley, South Dakota, with an average temperature varying between 56.3°F (13.5°C) and 75.4°F (24.1°C).

Temperature

With September's arrival, Glad Valley's weather changes as the average high-temperature falls from a moderately hot 84.7°F (29.3°C) in August to a still warm 75.4°F (24.1°C). Throughout the month of September, Glad Valley expects an average low of 56.3°F (13.5°C).

Humidity

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

Rainfall

In September, in Glad Valley, the rain falls for 7.9 days. Throughout September, 0.87" (22mm) of precipitation is accumulated. Throughout the year, in Glad Valley, there are 99.7 rainfall days, and 16.06" (408mm) of precipitation is accumulated.

Snowfall

In Glad Valley, snow does not fall in June through September.

Daylight

In Glad Valley, South Dakota, the average length of the day in September is 12h and 31min.
On the first day of the month, sunrise is at 6:09 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:28 pm MDT.

Sunshine

In September, the average sunshine is 9.7h.

UV index

In September, the average daily maximum UV index in Glad Valley is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 4 during September translates into the following directions:
Put precautions into practice - Protective measures against sun-induced damage are advised. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
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Frequently asked questions

What is the usual temperature for Glad Valley in September?

The high-temperature, in September, in Glad Valley, records 75.4°F (24.1°C), while the low-temperature is 56.3°F (13.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in August is estimated at 86°F (30°C).

What is the least humid month in Glad Valley?

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

What is the average humidity in September in Glad Valley?

The average relative humidity in September in Glad Valley, South Dakota, is 49%.

How much does it rain in Glad Valley in September?

In Glad Valley, South Dakota, in September, it is raining for 7.9 days, with typically 0.87" (22mm) of accumulated precipitation.

When it does not snow in Glad Valley?

In Glad Valley, snow does not fall in June through September.

Does it snow in Glad Valley in September?

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

How many hours of daylight does Glad Valley have in September?

In September, the average day length in Glad Valley, South Dakota, is 12h and 31min.

When is the sunrise / sunset in September in Glad Valley?

In September, on the first day of the month, sunrise is at 6:09 am and sunset at 7:24 pm. On the last day of the month, in Glad Valley, South Dakota, sunrise is at 6:45 am and sunset at 6:28 pm MDT.

How many hours of sunshine does Glad Valley have in September?

In September, the average sunshine duration in Glad Valley, South Dakota, is 9.7h.

What is the UV index intensity in September in Glad Valley?

The average daily maximum UV index in September in Glad Valley is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Glad Valley, SD

Average temperature in September - Glad Valley, SD
  • Average high temperature in September: 75.4°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).

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Average pressure in September
Glad Valley, SD

Average pressure in September - Glad Valley, SD
  • Average pressure in September: 29.94"Hg

The months with the highest atmospheric pressure are January and February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed in September
Glad Valley, SD

Average wind speed in September - Glad Valley, SD
  • Average wind speed in September: 11.3mph

The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest months (with the lowest average wind speed) are February and August (10.4mph).

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Average humidity in September
Glad Valley, SD

Average humidity in September - Glad Valley, SD
  • Average humidity in September: 49%

The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are August and September (49%).

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Average rainfall in September
Glad Valley, SD

Average rainfall in September - Glad Valley, SD
  • Average rainfall in September: 0.87"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in September
Glad Valley, SD

Average rainfall days in September - Glad Valley, SD
  • Average rainfall days in September: 7.9 days

The month with the highest number of rainy days is May (14.7 days).
The months with the least rainy days are January and February (3.3 days).

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Average snowfall in September
Glad Valley, SD

Average snowfall in September - Glad Valley, SD
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Glad Valley, SD

Average snowfall days in September - Glad Valley, SD
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.3 days).
The 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
Glad Valley, SD

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

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

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Average sunshine days in September
Glad Valley, SD

Average sunshine days in September - Glad Valley, SD
  • Average sunshine days in September: 20.4 days

The month with the most sunshine days is September (20.4 days).
The month with the least sunshine days is April (12.4 days).

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Average UV index in September
Glad Valley, SD

Average UV index in September - Glad Valley, SD
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 7).
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
Glad Valley, SD

Average cloud cover in September - Glad Valley, SD
  • Average cloud cover in September: 22

The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 19).

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Average visibility in September
Glad Valley, SD

Average visibility in September - Glad Valley, 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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Glad Valley, South Dakota, USA

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