September weather forecastTwin Valley, MN
September
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 12h and 30min
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 42min
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: 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: 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: 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: 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).
