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 brings a small shift in high-temperatures, falling from a warm 77°F (25°C) in August to a pleasant 69.8°F (21°C). Throughout the month of September, Butler witnesses an average temperature of 56.5°F (13.6°C).Humidity
In September, the average relative humidity is 77%.Rainfall
In Butler, during September, the rain falls for 12.1 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, there are 143.3 rainfall days, and 28.11" (714mm) of precipitation is accumulated.Snowfall
In Butler, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:34 pm CDT.
Sunshine
In Butler, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Be vigilant - A duty to shield skin and eyes from injury exists. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Butler have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Butler have in September?
What is the UV index reading in September?
Average temperature in September
Butler, WI
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in September
Butler, WI
- Average pressure in September: 30.03"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 (29.92"Hg).
Average wind speed in September
Butler, WI
- Average wind speed in September: 8.4mph
The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Butler, WI
- Average humidity in September: 77%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Butler, WI
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in September
Butler, WI
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Butler, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Butler, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Butler, 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 6min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Butler, 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 (10.9 days).
Average UV index in September
Butler, WI
- Average UV index in September: 4
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
Butler, WI
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Butler, 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).
Butler, Wisconsin, USA
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