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 arrival of September corresponds with a minor reduction in the average high-temperature, down from August's warm 75.9°F (24.4°C) to a pleasant 69.1°F (20.6°C). Clear Lake records an average nighttime low-temperature of 50.4°F (10.2°C) throughout September.Humidity
In Clear Lake, Wisconsin, the average relative humidity in September is 79%.Rainfall
In Clear Lake, Wisconsin, during September, the rain falls for 12.4 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, there are 128.1 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Clear Lake.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September in Clear Lake, sunrise is at 6:31 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:50 pm CDT.
Sunshine
In Clear Lake, the average sunshine in September is 8.5h.UV index
In Clear Lake, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Clear Lake in September?
What is the average humidity in September in Clear Lake?
How many days does it rain in September in Clear Lake?
When it does not snow in Clear Lake?
Does it snow in Clear Lake in September?
How many hours of daylight does Clear Lake have in September?
When is the sunrise / sunset in September in Clear Lake?
How many hours of sunshine does Clear Lake have in September?
What is the UV index reading in September in Clear Lake?
Average temperature in September
Clear Lake, WI
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (18°F).
- Average low temperature in September: 50.4°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 (5°F).
Average pressure in September
Clear Lake, WI
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Clear Lake, WI
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Clear Lake, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Clear Lake, WI
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Clear Lake, WI
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in September
Clear Lake, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clear Lake, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clear Lake, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Clear Lake, WI
- Average sunshine days in September: 15 days
The month with the most sunshine days is October (15.9 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in September
Clear Lake, 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
Clear Lake, WI
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Clear Lake, WI
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Clear Lake, Wisconsin, USA
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