September weather forecast
Twin Valley, MN

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Weather in September

September, the first month of the autumn in Twin Valley, is still a pleasant month, with an average temperature varying between 51.6°F (10.9°C) and 70.7°F (21.5°C).

Temperature

As September arrives, Twin Valley's weather displays a decrease in high-temperatures, transitioning from August's moderately hot 80.2°F (26.8°C) to an agreeable 70.7°F (21.5°C). In September, Twin Valley experiences a temperature dip to an average of 51.6°F (10.9°C) at night.

Humidity

The average relative humidity in September is 64%.

Rainfall

In September, the rain falls for 9.2 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. In Twin Valley, during the entire year, the rain falls for 101.8 days and collects up to 17.44" (443mm) of precipitation.

Snowfall

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

Daylight

In Twin Valley, the average length of the day in September is 12h and 32min.
On the first day of the month, sunrise is at 6:45 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:05 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 health risk from exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Updated: Jun 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Twin Valley in September?

In September, in Twin Valley, the average high-temperature is 70.7°F (21.5°C), and the average low-temperature is 51.6°F (10.9°C).

What is the average humidity in September?

In September, the average relative humidity is 64%.

How many days does it rain in September?

In Twin Valley, during September, the rain falls for 9.2 days and regularly aggregates up to 1.38" (35mm) of precipitation.

When it does not snow?

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

Does it snow in September?

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

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

In September, the average day length is 12h and 32min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:45 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:05 pm CDT.

How long on average sun shines in September?

In Twin Valley, the average sunshine duration in September is 8.7h.

How high is the UV index in September?

In Twin Valley, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health 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
Twin Valley, MN

Average temperature in September - Twin Valley, MN
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (15.6°F).

  • Average low temperature in September: 51.6°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (1°F).

Average pressure in September
Twin Valley, MN

Average pressure in September - Twin Valley, MN
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in September
Twin Valley, MN

Average wind speed in September - Twin Valley, MN
  • Average wind speed in September: 9.7mph

The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).

Average humidity in September
Twin Valley, MN

Average humidity in September - Twin Valley, MN
  • Average humidity in September: 64%

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (63%).

Average rainfall in September
Twin Valley, MN

Average rainfall in September - Twin Valley, MN
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is June (3.11").
The driest month (with the least rainfall) is January (0.55").

Average rainfall days in September
Twin Valley, MN

Average rainfall days in September - Twin Valley, MN
  • Average rainfall days in September: 9.2 days

The month with the highest number of rainy days is June (15.6 days).
The month with the least rainy days is January (1.5 days).

Average snowfall in September
Twin Valley, MN

Average snowfall in September - Twin Valley, MN
  • Average snowfall in September: 0"

The month with the highest snowfall is December (4.49").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Twin Valley, MN

Average snowfall days in September - Twin Valley, MN
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in September /
Average sunshine in September
Twin Valley, MN

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

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).

Average sunshine days in September
Twin Valley, MN

Average sunshine days in September - Twin Valley, MN
  • Average sunshine days in September: 19.4 days

The month with the most sunshine days is August (19.6 days).
The month with the least sunshine days is June (11.5 days).

Average UV index in September
Twin Valley, MN

Average UV index in September - Twin Valley, MN
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover in September
Twin Valley, MN

Average cloud cover in September - Twin Valley, MN
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 25).

Average visibility in September
Twin Valley, MN

Average visibility in September - Twin Valley, MN
  • Average visibility in September: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

Twin Valley, Minnesota, USA

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