September weather forecastGreenleaf, WI
September
Weather in September
September, the first month of the autumn in Greenleaf, is still a pleasant month, with an average temperature varying between 69.6°F (20.9°C) and 52.2°F (11.2°C).Temperature
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 77°F (25°C) in August to an agreeable 69.6°F (20.9°C). In Greenleaf, September nights witness a steady temperature drop to a fresh 52.2°F (11.2°C).Humidity
The average relative humidity in September in Greenleaf is 80%.Rainfall
In Greenleaf, during September, the rain falls for 12.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 132.7 rainfall days, and 24.33" (618mm) of precipitation is accumulated.Snowfall
In Greenleaf, snow does not fall in May 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 7:28 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:34 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the UV index of 3 transforms into the following advice:
Undertake precautions - Guarding against sun damage is counselled. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenleaf, WI
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in September
Greenleaf, 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
Greenleaf, WI
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Greenleaf, WI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Greenleaf, WI
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Greenleaf, WI
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Greenleaf, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Greenleaf, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greenleaf, 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 36min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average sunshine days in September
Greenleaf, WI
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Greenleaf, 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
Greenleaf, WI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Greenleaf, 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).
