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Lake Koshkonong, Wisconsin Weather Forecast
Lake Koshkonong, Wisconsin Weather
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Weather Forecast for Lake Koshkonong, Wisconsin : Jefferson County
Issued: 12:11 am CST Dec 7, 2025 Latitude: 42.9097273 Longitude: -88.9195531 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
100% chance of snow on Overnight 20% chance of snow on Sunday Mostly Cloudy on Monday 30% chance of rain & snow on Tuesday 40% chance of snow on Wednesday 30% chance of snow on Thursday 20% chance of snow on Friday Mostly Sunny on Saturday
Low: 15°F High: 18 °F High: 22°F High: 36°F High: 33°F High: 24°F High: 13°F High: 10°F
Low: 0 °F Low: 14°F Low: 28°F Low: 11°F Low: 5°F Low: -3°F  
Snow Snow Mostly Cloudy Rain & Snow Snow Snow Snow Mostly Sunny
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Current Conditions at
WATERTOWN - (KRYV)
23°
Cloudy
Light Snow
as of 12:15 AM CST
Rel. Humidity: 85%
Dew Point: 19°F
Visibility: 1 1/4 Miles
Pressure: 30.02 in.
Flight Rule: IFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1300ft
Current Conditions at
JANESVILLE - (KJVL)
23°
Cloudy
Light Snow
as of 12:15 AM CST
Rel. Humidity: 92%
Dew Point: 21°F
Visibility: 3/4 Miles
Pressure: 29.99 in.
Flight Rule: MVFR
Wind Data
5 MPH
030° Northeast
Current Conditions at
MADISON - (KMSN)
21°
Cloudy
Light Snow Mist
as of 12:05 AM CST
Rel. Humidity: 92%
Dew Point: 19°F
Visibility: 1 Miles
Pressure: 30.02 in.
Flight Rule: IFR
Wind Data
3 MPH
0° North
Current Conditions at
BURLINGTON MUNICIPAL AIR - (KBUU)
23°
Cloudy
as of 12:10 AM CST
Rel. Humidity: 92%
Dew Point: 21°F
Visibility: 1 Miles
Pressure: 29.99 in.
Flight Rule: IFR
Wind Data
3 MPH
010° North
Cloud Level(s): Solid Overcast at 1000ft
100% chance of snow Overnight Overnight... Snow. The snow could be heavy at times. Low around 15. North wind 5 to 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 3 inches possible.
20% chance of snow Sunday Sunday... A 20 percent chance of snow before 8am. Mostly cloudy, then gradually becoming sunny, with a temperature rising to near 18 by noon, then falling to around 11 during the remainder of the day. Wind chill values between zero and 5. North wind around 10 mph.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 0. Wind chill values between -5 and zero. North wind around 5 mph becoming calm in the evening.
Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 22. Light and variable wind becoming south 5 to 10 mph in the morning.
50% chance of snow Monday Night Monday Night... A 50 percent chance of snow. Mostly cloudy, with a low around 14. South wind 10 to 15 mph, with gusts as high as 25 mph.
30% chance of rain & snow Tuesday Tuesday... A chance of rain and snow after noon. Mostly cloudy, with a high near 36. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.
90% chance of rain & snow Tuesday Night Tuesday Night... Rain, possibly mixed with snow. Low around 28. Breezy, with a south wind 15 to 20 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
40% chance of snow Wednesday Wednesday... A 40 percent chance of snow showers. Mostly cloudy, with a high near 33. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph.
30% chance of snow Wednesday Night Wednesday Night... A 30 percent chance of snow showers. Mostly cloudy, with a low around 11.
30% chance of snow Thursday Thursday... A 30 percent chance of snow. Mostly cloudy, with a high near 24.
30% chance of snow Thursday Night Thursday Night... A 30 percent chance of snow showers. Mostly cloudy, with a low around 5.
20% chance of snow Friday Friday... A 20 percent chance of snow showers. Partly sunny, with a high near 13.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -3.
Mostly Sunny on Saturday Saturday... Mostly sunny and cold, with a high near 10.
Current Radar Image


Sun Almanac for Lake Koshkonong, Wisconsin
Sunrise: 07:13 AM
Sunset: 4:21 PM
Civil Sunrise:06:41 AM
Civil Sunset: 4:53 PM
Nautical Sunrise: 06:06 AM
Nautical Sunset: 5:29 PM
Astro Sunrise: 05:32 AM
Astro Sunset: 6:03 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.