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
September's arrival aligns with a minor decrease in average high-temperatures, from August's moderately hot 77.2°F (25.1°C) to a pleasant 70.2°F (21.2°C). The average low-temperature of 51.8°F (11°C) is witnessed during September.Humidity
In Butte des Morts, the average relative humidity in September is 80%.Rainfall
In September, in Butte des Morts, the rain falls for 9 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, in Butte des Morts, there are 104.9 rainfall days, and 12.36" (314mm) of precipitation is accumulated.Snowfall
In Butte des Morts, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 30min.On the first day of September, sunrise is at 6:18 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:36 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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 Butte des Morts have in September?
When are sunrise and sunset in September in Butte des Morts?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Butte des Morts, WI
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in September: 51.8°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 (10.8°F).
Average pressure in September
Butte des Morts, WI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Butte des Morts, WI
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Butte des Morts, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Butte des Morts, WI
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is June (1.77").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Butte des Morts, WI
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Butte des Morts, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Butte des Morts, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Butte des Morts, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
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 months with the least sunshine are January and February (Average sunshine: 3h and 24min).
Average sunshine days in September
Butte des Morts, WI
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in September
Butte des Morts, 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, February, November and December (UV index 1).
Average cloud cover in September
Butte des Morts, WI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Butte des Morts, 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).
Butte des Morts, Wisconsin, USA
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