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
With the onset of September, the average high-temperature subtly recedes from August's warm 77.4°F (25.2°C) to a pleasant 70.2°F (21.2°C). Greenville registers a consistent average low-temperature of 52°F (11.1°C) during September.Humidity
In September, the average relative humidity in Greenville is 79%.Rainfall
In Greenville, during September, the rain falls for 12.1 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, there are 131.1 rainfall days, and 24.45" (621mm) of precipitation is accumulated.Snowfall
In Greenville, snow does not fall in June through September.Daylight
In Greenville, the average length of the day in September is 12h and 30min.On the first day of September, sunrise is at 6:17 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:36 pm CDT.
Sunshine
In Greenville, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 3 in September transforms into the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Greenville in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Greenville have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Greenville, WI
- Average high temperature in September: 70.2°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 (21.9°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Greenville, WI
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Greenville, WI
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Greenville, WI
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Greenville, WI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in September
Greenville, WI
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in September
Greenville, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Greenville, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greenville, WI
- Average daylight in September: 12h and 3min
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 3min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Greenville, WI
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in September
Greenville, 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
Greenville, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Greenville, WI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Greenville, Wisconsin, USA
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