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Grellton, Wisconsin Weather Forecast
Grellton, Wisconsin Weather
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Weather Forecast for Grellton, Wisconsin : Jefferson County
Issued: 2:27 am CST Dec 18, 2025 Latitude: 43.1349999 Longitude: -88.7884375 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
50% chance of rain on Overnight 100% chance of rain & snow on Thursday Increasing Clouds on Friday 20% chance of snow on Saturday Sunny on Sunday Mostly Cloudy on Monday Partly Sunny on Tuesday Partly Sunny on Wednesday
Low: 40°F High: 43 °F High: 23°F High: 37°F High: 18°F High: 35°F High: 39°F High: 38°F
Low: 7 °F Low: 17 °F Low: 5 °F Low: 15°F Low: 28°F Low: 23°F  
Rain Rain & Snow Increasing Clouds Snow Sunny Mostly Cloudy Partly Sunny Partly Sunny
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Current Conditions at
WATERTOWN - (KRYV)
39°
Feels like 32°F
Cloudy
as of 2:35 AM CST
Rel. Humidity: 75%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 29.57 in.
Flight Rule: VFR
Wind Data
12 MPH
180° South
Cloud Level(s): Solid Overcast at 3100ft
Current Conditions at
JUNEAU - (KUNU)
37°
Feels like 28°F
Cloudy
as of 2:35 AM CST
Rel. Humidity: 80%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 29.57 in.
Flight Rule: VFR
Wind Data
14 MPH
150° Southeast
Cloud Level(s): Scattered at 3200ft, Solid Overcast at 3900ft
Current Conditions at
MADISON - (KMSN)
37°
Feels like 30°F
Cloudy
as of 1:53 AM CST
Rel. Humidity: 86%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.57 in.
Flight Rule: VFR
Wind Data
10 MPH
190° South
Cloud Level(s): Solid Overcast at 4300ft
Current Conditions at
WAUKESHA - (KUES)
37°
Cloudy
as of 2:35 AM CST
Rel. Humidity: 80%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 29.61 in.
Flight Rule: MVFR
Wind Data
7 MPH
160° South
Cloud Level(s): Solid Overcast at 2400ft
50% chance of rain Overnight Overnight... A 50 percent chance of rain after 4am. Cloudy, with a steady temperature around 40. South wind around 15 mph, with gusts as high as 30 mph.
100% chance of rain & snow Thursday Thursday... Rain before 4pm, then a chance of rain and snow showers between 4pm and 5pm, then snow showers likely after 5pm. Temperature rising to near 43 by 10am, then falling to around 32 during the remainder of the day. South wind around 15 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
50% chance of snow Thursday Night Thursday Night... A 50 percent chance of snow showers, mainly before 9pm. Mostly cloudy, with a low around 7. Wind chill values between -10 and zero. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph.
Increasing Clouds on Friday Friday... Increasing clouds, with a high near 23. Wind chill values between -10 and zero. Northwest wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 30 mph.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a temperature falling to near 17 by 9pm, then rising to around 27 during the remainder of the night. South wind 5 to 10 mph.
20% chance of snow Saturday Saturday... A 20 percent chance of snow showers before noon. Mostly cloudy, with a high near 37. South wind around 10 mph becoming west in the afternoon.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 5. West wind around 10 mph.
Sunny on Sunday Sunday... Sunny, with a high near 18. Northwest wind 5 to 10 mph.
20% chance of snow Sunday Night Sunday Night... A 20 percent chance of snow after midnight. Increasing clouds, with a steady temperature around 15.
Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 35.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 28.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 39.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 23.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 38.
Current Radar Image


Sun Almanac for Grellton, Wisconsin
Sunrise: 07:22 AM
Sunset: 4:22 PM
Civil Sunrise:06:50 AM
Civil Sunset: 4:54 PM
Nautical Sunrise: 06:14 AM
Nautical Sunset: 5:30 PM
Astro Sunrise: 05:39 AM
Astro Sunset: 6:05 PM
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