September weather forecastFitchburg, WI
September
Weather in September
September marks the arrival of autumn in Fitchburg with a distinctive shift in the weather. Daylight hours reduce to 12.5 hours per day as opposed to the summer peaks. The fading warmth of summer gives way to the crisp air of fall, creating a scenic panorama of changing foliage. Fitchburg's weather lends a unique allure to the city during this period.Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from a moderately hot 77.5°F (25.3°C) in August to an agreeable 71.2°F (21.8°C). In Fitchburg, in September, the average low-temperature is a cool 52°F (11.1°C).Humidity
The average relative humidity in September in Fitchburg is 81%.Rainfall
In Fitchburg, during September, the rain falls for 7.7 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 92.1 rainfall days, and 7.28" (185mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Fitchburg, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:23 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:40 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Act with care - The need to guard against sun damage is communicated. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fitchburg, WI
- Average high temperature in September: 71.2°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 (24.3°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
Fitchburg, WI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Fitchburg, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Fitchburg, WI
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Fitchburg, WI
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is June (0.98").
The driest month (with the least rainfall) is December (0.31").
Average rainfall days in September
Fitchburg, WI
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is February (2.2 days).
Average snowfall in September
Fitchburg, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Fitchburg, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Fitchburg, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Fitchburg, WI
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14.3 days).
Average UV index in September
Fitchburg, WI
- Average UV index in September: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Fitchburg, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July, August and September (Cloud cover 35).
Average visibility in September
Fitchburg, WI
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
