Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 77.2°F (25.1°C) in August to an agreeable 70.9°F (21.6°C). Throughout September, Windsor encounters an average temperature drop to a cool 52°F (11.1°C).Humidity
In September, the average relative humidity is 81%.Rainfall
In Windsor, in September, during 10.4 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Windsor, during the entire year, the rain falls for 122.8 days and collects up to 15.51" (394mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Windsor is 12h and 29min.On the first day of September, sunrise is at 6:22 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:39 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Windsor is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 3 during September translates into the following guidance:
Put precautions into practice - Protective measures against sun-induced damage are advised. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Windsor in September?
What is the average humidity in September in Windsor?
How much does it rain in Windsor in September?
When it does not snow in Windsor?
Does it snow in Windsor in September?
How many hours of daylight does Windsor have in September?
When is the sunrise / sunset in September in Windsor?
How many hours of sunshine does Windsor have in September?
What is the UV index reading in September in Windsor?
Average temperature in September
Windsor, WI
- Average high temperature in September: 70.9°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).
Average pressure in September
Windsor, 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
Windsor, 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
Windsor, WI
- Average humidity in September: 81%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Windsor, WI
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Windsor, WI
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is June (17 days).
The months with the least rainy days are January and February (3.8 days).
Average snowfall in September
Windsor, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Windsor, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Windsor, WI
- Average daylight in September: 12h and 3min
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 0min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Windsor, WI
- Average sunshine days in September: 17 days
The months with the most sunshine days are October and November (18.5 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Windsor, WI
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Windsor, WI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Windsor, WI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Windsor, Wisconsin, USA
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