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 onset brings a negligible change in high-temperatures, falling from a warm 76.1°F (24.5°C) in August to a pleasant 68.9°F (20.5°C). Custer anticipates an average minimum temperature of 50.9°F (10.5°C) in the month of September.Humidity
The average relative humidity in September in Custer is 80%.Rainfall
In September, the rain falls for 12.3 days. Throughout September, 1.77" (45mm) of precipitation is accumulated. Throughout the year, in Custer, there are 123.2 rainfall days, and 23.54" (598mm) of precipitation is accumulated.Snowfall
In Custer, snow does not fall in June through September.Daylight
In Custer, the average length of the day in September is 12h and 30min.On the first day of September, sunrise is at 6:21 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:39 pm CDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In Custer, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In September, a daily UV index of 3 turns into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What is the average September temperature in Custer?
What is the average humidity in September in Custer?
How many days does it rain in September in Custer?
When it does not snow in Custer?
Does it snow in Custer in September?
How many hours of daylight does Custer have in September?
When are sunrise and sunset in September in Custer?
How many hours of sunshine does Custer have in September?
How high is the UV index in September in Custer?
Average temperature in September
Custer, WI
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (20.5°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in September
Custer, WI
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Custer, WI
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (7.2mph).
Average humidity in September
Custer, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Custer, WI
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Custer, WI
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Custer, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Custer, 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
Custer, 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 2min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Custer, WI
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (17 days).
The months with the least sunshine days are April, May and June (12.7 days).
Average UV index in September
Custer, WI
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Custer, WI
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 70).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Custer, WI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Custer, Wisconsin, USA
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