September weather forecastSomerset, WI
September
Weather in September
September, the first month of the autumn in Somerset, is still a pleasant month, with an average temperature varying between 69.6°F (20.9°C) and 51.1°F (10.6°C).Temperature
The onset of September brings a small shift in high-temperatures, falling from a warm 76.6°F (24.8°C) in August to an agreeable 69.6°F (20.9°C). Somerset anticipates an average minimum temperature of 51.1°F (10.6°C) in the month of September.Humidity
The average relative humidity in September is 79%.Rainfall
In Somerset, Wisconsin, in September, it is raining for 12 days, with typically 2.01" (51mm) of accumulated precipitation. Throughout the year, there are 124.4 rainfall days, and 22.64" (575mm) of precipitation is accumulated.Snowfall
In Somerset, snow does not fall in June through September.Daylight
In Somerset, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:33 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:52 pm CDT.
Sunshine
In Somerset, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 4 during September leads to these advisories:
Exercise caution. Those with pale skin may experience burns in less than half an hour. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Somerset, WI
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in September: 51.1°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).
Average pressure in September
Somerset, WI
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Somerset, WI
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Somerset, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Somerset, WI
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Somerset, WI
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is January (2.3 days).
Average snowfall in September
Somerset, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Somerset, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Somerset, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January and February (Average sunshine: 2h and 54min).
Average sunshine days in September
Somerset, WI
- Average sunshine days in September: 16 days
The months with the most sunshine days are October and December (16.1 days).
The month with the least sunshine days is June (10 days).
Average UV index in September
Somerset, WI
- 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
Somerset, WI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Somerset, WI
- 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).
