September weather forecastThomson, MN
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Thomson, Minnesota, with an average temperature fluctuating between 48.6°F (9.2°C) and 67.8°F (19.9°C).Temperature
With September's arrival, Thomson's weather changes as the average high-temperature falls from a moderately hot 76.8°F (24.9°C) in August to a comfortable 67.8°F (19.9°C). During September, the average low-temperature in Thomson is a frosty 48.6°F (9.2°C).Humidity
In September, the average relative humidity is 77%.Rainfall
In Thomson, in September, it is raining for 12.7 days, with typically 1.81" (46mm) of accumulated precipitation. In Thomson, during the entire year, the rain falls for 120.8 days and collects up to 22.87" (581mm) of precipitation.Snowfall
In Thomson, Minnesota, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:30 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:50 pm CDT.
Sunshine
The average sunshine in September in Thomson is 8h.UV index
In Thomson, Minnesota, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 in September translates into these instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Thomson, MN
- Average high temperature in September: 67.8°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (16.2°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (2.5°F).
Average pressure in September
Thomson, MN
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Thomson, MN
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Thomson, MN
- Average humidity in September: 77%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Thomson, MN
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Thomson, MN
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Thomson, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (7.6").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Thomson, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Thomson, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Thomson, MN
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (15.3 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Thomson, 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, November and December (UV index 1).
Average cloud cover in September
Thomson, MN
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Thomson, MN
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
