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.

Fog/Mist

21°F

-6°C

Humidity 100%
Wind Speed SW 6 mph
Barometer 30.04 in
Dewpoint 21°F (-6°C)
Visibility 4.00 mi
Wind Chill13°F (-11°C)
Last update 2 Feb 2:15 am CST
Extended Forecast for

Darien WI

  • Overnight

    Overnight: Areas of snow and freezing rain before 3am, then areas of freezing rain. Cloudy, with a low around 18. Southwest wind around 5 mph. Chance of precipitation is 30%.

    Low: 18 °F

    Areas Wintry
    Mix

  • Monday

    Monday: Mostly cloudy, with a high near 24. Northwest wind 5 to 10 mph.

    High: 24 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A slight chance of snow between midnight and 2am. Mostly cloudy, with a low around 9. West wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 9 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: Sunny, with a high near 20. North wind around 5 mph.

    High: 20 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 1. North wind around 5 mph becoming calm.

    Low: 1 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 22. Calm wind becoming west around 5 mph.

    High: 22 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 8. West wind around 5 mph becoming calm.

    Low: 8 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 30. Southwest wind 5 to 15 mph.

    High: 30 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Chance Snow

Detailed Forecast

Overnight
Areas of snow and freezing rain before 3am, then areas of freezing rain. Cloudy, with a low around 18. Southwest wind around 5 mph. Chance of precipitation is 30%.
Monday
Mostly cloudy, with a high near 24. Northwest wind 5 to 10 mph.
Monday Night
A slight chance of snow between midnight and 2am. Mostly cloudy, with a low around 9. West wind around 5 mph becoming calm. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 20. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 1. North wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 22. Calm wind becoming west around 5 mph.
Wednesday Night
Partly cloudy, with a low around 8. West wind around 5 mph becoming calm.
Thursday
Partly sunny, with a high near 30. Southwest wind 5 to 15 mph.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 28.
Friday
A 20 percent chance of snow before noon. Partly sunny, with a high near 32.
Friday Night
Partly cloudy, with a low around 7.
Saturday
Mostly sunny, with a high near 22.
Saturday Night
A 20 percent chance of snow. Partly cloudy, with a low around 12.
Sunday
Mostly sunny, with a high near 27.
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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:
2:12 am CST Feb 2, 2026
Forecast Valid:
2am CST Feb 2, 2026-6pm CST Feb 8, 2026
 
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