September weather forecast
Winfred, SD

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Weather in September

September, the first month of the autumn in Winfred, is still a pleasant month, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 73°F (22.8°C).

Temperature

The arrival of September corresponds with a light shift in temperature, down from a moderately hot 81°F (27.2°C) in August to an agreeable 73°F (22.8°C). September nights cool down to an average low-temperature of 52.7°F (11.5°C).

Humidity

The average relative humidity in September is 69%.

Rainfall

In Winfred, South Dakota, in September, during 10.4 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, in Winfred, South Dakota, there are 111.2 rainfall days, and 21.14" (537mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of September, sunrise is at 6:53 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:11 pm CDT.

Sunshine

In September, the average sunshine is 8.7h.

UV index

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 radiation for the ordinary person.
Note: A maximum UV index of 4 in September translates into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Updated: Jun 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Winfred in September?

The high-temperature during September is 73°F (22.8°C) and the low-temperature is 52.7°F (11.5°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is estimated at 84.2°F (29°C).

What is the average humidity in September?

In September, the average relative humidity is 69%.

How many days does it rain in September?

In Winfred, during September, the rain falls for 10.4 days and regularly aggregates up to 1.61" (41mm) of precipitation.

When it does not snow?

In Winfred, snow does not fall in June through September.

Does it snow in September?

In Winfred, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Winfred have in September?

The average day length in September is 12h and 29min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:53 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:11 pm CDT.

How many hours of sunshine does Winfred have in September?

The average sunshine duration in September is 8.7h.

How high is the UV index in September?

In Winfred, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
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
Winfred, SD

Average temperature in September - Winfred, SD
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (22.3°F).

  • Average low temperature in September: 52.7°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).

Average pressure in September
Winfred, SD

Average pressure in September - Winfred, SD
  • Average pressure in September: 29.97"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in September
Winfred, SD

Average wind speed in September - Winfred, SD
  • Average wind speed in September: 9.9mph

The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.6mph).

Average humidity in September
Winfred, SD

Average humidity in September - Winfred, SD
  • Average humidity in September: 69%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (67%).

Average rainfall in September
Winfred, SD

Average rainfall in September - Winfred, SD
  • Average rainfall in September: 1.61"

The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is November (0.59").

Average rainfall days in September
Winfred, SD

Average rainfall days in September - Winfred, SD
  • Average rainfall days in September: 10.4 days

The month with the highest number of rainy days is June (18.7 days).
The month with the least rainy days is January (1.6 days).

Average snowfall in September
Winfred, SD

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

The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Winfred, SD

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

The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in September
Winfred, SD

Average sunshine days in September - Winfred, SD
  • Average sunshine days in September: 18 days

The month with the most sunshine days is November (22.4 days).
The month with the least sunshine days is June (9.5 days).

Average UV index in September
Winfred, SD

Average UV index in September - Winfred, SD
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in September
Winfred, SD

Average cloud cover in September - Winfred, SD
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in September
Winfred, SD

Average visibility in September - Winfred, 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).

Winfred, South Dakota, USA

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