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Lake Koshkonong, Wisconsin Weather Forecast
Lake Koshkonong, Wisconsin Weather
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Click for Hazardous Weather Outlook for Lake Koshkonong, Wisconsin
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Weather Forecast for Lake Koshkonong, Wisconsin : Jefferson County
Issued: 11:16 pm CST Dec 4, 2025 Latitude: 42.9097273 Longitude: -88.9195531 View on Google Maps

MouseOver for Detail Forecast
Overnight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
Mostly Cloudy on Overnight 20% chance of freezing rain & snow on Friday Partly Sunny on Saturday 30% chance of snow on Sunday 20% chance of snow on Monday 30% chance of snow on Tuesday 60% chance of snow on Wednesday 30% chance of snow on Thursday
Low: 9 °F High: 26°F High: 24°F High: 18°F High: 20°F High: 29°F High: 29°F High: 21°F
Low: 18°F Low: 10°F Low: -5°F Low: 15 °F Low: 17°F Low: 7°F  
Mostly Cloudy Freezing Rain & Snow Partly Sunny Snow Snow Snow Snow Snow
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Current Conditions at
WATERTOWN - (KRYV)
3°
Clear
as of 11:55 PM CST
Rel. Humidity: 59%
Dew Point: -8°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
6 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
JANESVILLE - (KJVL)
5°
Partly Cloudy
as of 11:55 PM CST
Rel. Humidity: 71%
Dew Point: -2°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
7 MPH
190° South
Cloud Level(s): Scattered at 3800ft
Current Conditions at
MADISON - (KMSN)
10°
Feels like -3°F
Cloudy
as of 11:53 PM CST
Rel. Humidity: 51%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
10 MPH
200° South
Cloud Level(s): Solid Overcast at 3200ft
Current Conditions at
BURLINGTON MUNICIPAL AIR - (KBUU)
Clear
as of 11:55 PM CST
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
9 MPH
190° South
Cloud Level(s): Clear
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a temperature rising to around 9 by 5am. Wind chill values between -5 and -15. Southwest wind 10 to 15 mph.
20% chance of freezing rain & snow Friday Friday... A slight chance of snow and freezing rain after 5pm. Mostly cloudy, with a high near 26. Wind chill values between -5 and 5. Southwest wind 10 to 15 mph. Chance of precipitation is 20%.
40% chance of freezing rain & snow Friday Night Friday Night... A chance of snow and freezing rain before midnight. Mostly cloudy, with a low around 18. Southwest wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 40%.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 24. West wind around 5 mph becoming north in the afternoon.
60% chance of snow Saturday Night Saturday Night... Snow likely, mainly after midnight. Mostly cloudy, with a low around 10. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
30% chance of snow Sunday Sunday... A 30 percent chance of snow before noon. Partly sunny, with a high near 18. North wind 5 to 10 mph.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around -5. North wind 5 to 10 mph becoming light after midnight.
20% chance of snow Monday Monday... A 20 percent chance of snow after noon. Partly sunny, with a high near 20. Light and variable wind becoming south 5 to 10 mph in the morning.
70% chance of snow Monday Night Monday Night... Snow likely. Cloudy, with a temperature falling to near 15 by 8pm, then rising to around 23 during the remainder of the night. Chance of precipitation is 70%.
30% chance of snow Tuesday Tuesday... A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 29.
70% chance of snow Tuesday Night Tuesday Night... Snow likely. Cloudy, with a low around 17. Chance of precipitation is 70%.
60% chance of snow Wednesday Wednesday... Snow likely. Mostly cloudy, with a high near 29. Chance of precipitation is 60%.
30% chance of snow Wednesday Night Wednesday Night... A 30 percent chance of snow. Mostly cloudy, with a low around 7.
30% chance of snow Thursday Thursday... A 30 percent chance of snow. Partly sunny, with a high near 21.
Current Radar Image


Sun Almanac for Lake Koshkonong, Wisconsin
Sunrise: 07:12 AM
Sunset: 4:21 PM
Civil Sunrise:06:40 AM
Civil Sunset: 4:53 PM
Nautical Sunrise: 06:04 AM
Nautical Sunset: 5:29 PM
Astro Sunrise: 05:30 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.