September weather forecastKewaunee, WI
September
Weather in September
September, the first month of the autumn in Kewaunee, is still a pleasant month, with an average temperature fluctuating between 68°F (20°C) and 55.6°F (13.1°C).Temperature
In September, the average high-temperature marginally drops from a moderately hot 75.6°F (24.2°C) in August to a pleasant 68°F (20°C). During the month of September, an average low-temperature of 55.6°F (13.1°C) is recorded in Kewaunee.Humidity
The average relative humidity in September in Kewaunee is 78%.Rainfall
In September, in Kewaunee, Wisconsin, the rain falls for 13.2 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. In Kewaunee, during the entire year, the rain falls for 132.6 days and collects up to 25.55" (649mm) of precipitation.Snowfall
June through September are months without snowfall.Ocean temperature
In Kewaunee, in September, the average water temperature is 65.5°F (18.6°C).Note: Most people do not take pleasure in swimming in water at 65.5°F (18.6°C). The difficulty of managing breathing increases as the water temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Kewaunee, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:47 am and sunset at 6:31 pm CDT.
Sunshine
In Kewaunee, the average sunshine in September is 8.6h.UV index
In Kewaunee, Wisconsin, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, the UV index of 3 transforms into the following advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kewaunee, WI
- Average high temperature in September: 68°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Kewaunee, WI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Kewaunee, WI
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
Kewaunee, WI
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Kewaunee, WI
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in September
Kewaunee, WI
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (4.2 days).
Average snowfall in September
Kewaunee, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Kewaunee, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Kewaunee, WI
- Average sea temperature in September: 65.5°F
The best month for swimming (with the highest average sea temperature) is August (69.7°F).
The coldest month (with the lowest average sea temperature) is February (36.6°F).
Average daylight in September /
Average sunshine in September
Kewaunee, WI
- Average daylight in September: 12h and 30min
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 36min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 3h and 12min).
Average sunshine days in September
Kewaunee, WI
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (11 days).
Average UV index in September
Kewaunee, WI
- Average UV index in September: 3
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
Kewaunee, WI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Kewaunee, 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).
