National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Snow

23°F

-5°C

Humidity 100%
Wind Speed N 6 mph
Barometer 30.00 in
Dewpoint 23°F (-5°C)
Visibility 0.75 mi
Wind Chill16°F (-9°C)
Last update 7 Dec 1:15 am CST
Extended Forecast for

Darien WI

Winter Weather Advisory until December 7, 08:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 7, 08:00am

    NOW until 8:00am Sun

    Winter Weather Advisory

  • Overnight

    Low: 16 °F

    Heavy Snow

  • Sunday

    Sunday: A 50 percent chance of snow before 8am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 10 by 5pm. Wind chill values between zero and 10. North wind 5 to 15 mph.

    High: 19 °F⇓

    Chance Snow
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 0. Wind chill values between -5 and -10. North wind around 5 mph becoming calm in the evening.

    Low: 0 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 22. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 22 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 40 percent chance of snow. Mostly cloudy, with a temperature falling to near 15 by 8pm, then rising to around 24 during the remainder of the night. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 15 °F⇑

    Chance Snow

  • Tuesday

    Tuesday: A chance of rain and snow after noon. Mostly cloudy, with a high near 35. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.

    High: 35 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow. Low around 27. South wind 10 to 15 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.

    Low: 27 °F

    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a temperature falling to around 26 by 5pm. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 34 °F⇓

    Chance
    Rain/Snow and
    Breezy then
    Slight Chance
    Snow

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Low around 16. Northeast wind 5 to 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 2 to 4 inches possible.
Sunday
A 50 percent chance of snow before 8am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 10 by 5pm. Wind chill values between zero and 10. North wind 5 to 15 mph.
Sunday Night
Mostly cloudy, with a low around 0. Wind chill values between -5 and -10. North wind around 5 mph becoming calm in the evening.
Monday
Mostly cloudy, with a high near 22. Light and variable wind becoming south 5 to 10 mph in the morning.
Monday Night
A 40 percent chance of snow. Mostly cloudy, with a temperature falling to near 15 by 8pm, then rising to around 24 during the remainder of the night. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
A chance of rain and snow after noon. Mostly cloudy, with a high near 35. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.
Tuesday Night
Rain, possibly mixed with snow. Low around 27. South wind 10 to 15 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.
Wednesday
A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a temperature falling to around 26 by 5pm. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 12.
Thursday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 22.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 4.
Friday
A 20 percent chance of snow. Partly sunny, with a high near 14.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around -4.
Saturday
Partly sunny and cold, with a high near 9.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
12:56 am CST Dec 7, 2025
Forecast Valid:
1am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation