September weather forecast
Yale, SD

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Weather in September

The first month of the autumn, September, is still a warm month in Yale, South Dakota, with an average temperature varying between 54.5°F (12.5°C) and 75.7°F (24.3°C).

Temperature

With the beginning of September, the average high-temperature shows a small decrease, transitioning from 84.2°F (29°C) in August to a still moderately hot 75.7°F (24.3°C). During September, Yale records an average temperature of 54.5°F (12.5°C) at night.

Humidity

With an average relative humidity of 62%, September is the least humid month in Yale.

Rainfall

In September, the rain falls for 9.8 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. Throughout the year, there are 101.8 rainfall days, and 18.19" (462mm) of precipitation is accumulated.

Snowfall

In Yale, snow does not fall in May through September.

Daylight

The average length of the day in September is 12h and 30min.
On the first day of September, sunrise is at 6:55 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:13 pm CDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In September, a regular UV index of 4 translates into these guidelines:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Enhance your sun protection with tightly woven, yet airy clothing.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

The high-temperature, in September, in Yale, is 75.7°F (24.3°C), while the low-temperature averages to 54.5°F (12.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, is appraised at 89.6°F (32°C).

What is the least humid month?

The least humid month is September, with an average relative humidity of 62%.

What is the average humidity in September?

The average relative humidity in September is 62%.

How many days does it rain in September?

In Yale, in September, during 9.8 rainfall days, 1.38" (35mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in September?

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

How many hours of daylight does Yale have in September?

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:55 am and sunset at 8:07 pm. On the last day of the month, in Yale, sunrise is at 7:29 am and sunset at 7:13 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.9h.

How high is the UV index in September?

In Yale, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes 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
Yale, SD

Average temperature in September - Yale, SD
  • Average high temperature in September: 75.7°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (23.2°F).

  • Average low temperature in September: 54.5°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (8.2°F).

Average pressure in September
Yale, SD

Average pressure in September - Yale, SD
  • Average pressure in September: 29.96"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in September
Yale, SD

Average wind speed in September - Yale, SD
  • Average wind speed in September: 9.7mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.6mph).

Average humidity in September
Yale, SD

Average humidity in September - Yale, SD
  • Average humidity in September: 62%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (62%).

Average rainfall in September
Yale, SD

Average rainfall in September - Yale, SD
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.55").

Average rainfall days in September
Yale, SD

Average rainfall days in September - Yale, SD
  • Average rainfall days in September: 9.8 days

The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (1.8 days).

Average snowfall in September
Yale, SD

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

The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Yale, SD

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

The month with the highest number of snowfall days is December (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Yale, 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: 8h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in September
Yale, SD

Average sunshine days in September - Yale, SD
  • Average sunshine days in September: 17.5 days

The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (12.3 days).

Average UV index in September
Yale, SD

Average UV index in September - Yale, 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 and November (UV index 1).

Average cloud cover in September
Yale, SD

Average cloud cover in September - Yale, SD
  • Average cloud cover in September: 26

The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 22).

Average visibility in September
Yale, SD

Average visibility in September - Yale, 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).

Yale, South Dakota, USA

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