September weather forecastSeymour, WI
September
Weather in September
September, the first month of the autumn in Seymour, is also an agreeable month, with an average temperature fluctuating between 51.6°F (10.9°C) and 69.8°F (21°C).Temperature
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a warm 77.5°F (25.3°C) in August to an agreeable 69.8°F (21°C). Seymour experiences an average nighttime temperature of 51.6°F (10.9°C) in the month of September.Humidity
In Seymour, the average relative humidity in September is 79%.Rainfall
In Seymour, in September, during 11.4 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, in Seymour, there are 125.3 rainfall days, and 24.84" (631mm) of precipitation is accumulated.Snowfall
In Seymour, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:35 pm CDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Seymour, WI
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
Seymour, WI
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Seymour, WI
- Average wind speed in September: 8mph
The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Seymour, WI
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Seymour, WI
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in September
Seymour, WI
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in September
Seymour, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Seymour, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Seymour, WI
- Average daylight in September: 12h and 30min
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 18min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January and February (Average sunshine: 3h and 24min).
Average sunshine days in September
Seymour, WI
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in September
Seymour, WI
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Seymour, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Seymour, WI
- 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).
