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.

Light Drizzle

39°F

4°C

Humidity 93%
Wind Speed NW 14 mph
Barometer 29.46 in
Dewpoint 37°F (3°C)
Visibility 5.00 mi
Wind Chill31°F (-1°C)
Last update 28 Dec 4:45 pm CST
Extended Forecast for

Darien WI

Wind Advisory December 28, 06:00pm until December 29, 06:00pm
Click here for hazard details and duration
Wind Advisory

  • This Afternoon

    This Afternoon: Rain likely. Patchy fog. Otherwise, cloudy, with a high near 47. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 47 °F

    Rain Likely
    and Patchy
    Fog

  • Tonight

    Tonight: A chance of rain before 7pm, then a chance of rain and snow between 7pm and 8pm, then snow after 8pm. Patchy blowing snow after 10pm. Low around 16. Wind chill values between -5 and 5. Windy, with a west wind 20 to 25 mph increasing to 25 to 30 mph in the evening. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 16 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely, mainly before 7am. Areas of blowing snow. Cloudy, then gradually becoming mostly sunny, with a high near 20. Wind chill values between zero and 5. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 20 °F

    Snow Likely
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: Patchy blowing snow before 8pm. Partly cloudy, with a low around 7. Wind chill values between -5 and zero. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 7 °F

    Patchy
    Blowing Snow
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 26. Southwest wind 10 to 15 mph.

    High: 26 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a steady temperature around 25. West wind 10 to 15 mph.

    Low: 25 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 26. Northwest wind 10 to 15 mph.

    High: 26 °F

    Cloudy then
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 7. Northwest wind around 5 mph.

    Low: 7 °F

    Chance Snow
    then Partly
    Cloudy

  • New Year's Day

    New Year's Day: Sunny, with a high near 16.

    High: 16 °F

    Sunny

Detailed Forecast

This Afternoon
Rain likely. Patchy fog. Otherwise, cloudy, with a high near 47. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A chance of rain before 7pm, then a chance of rain and snow between 7pm and 8pm, then snow after 8pm. Patchy blowing snow after 10pm. Low around 16. Wind chill values between -5 and 5. Windy, with a west wind 20 to 25 mph increasing to 25 to 30 mph in the evening. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Monday
Snow likely, mainly before 7am. Areas of blowing snow. Cloudy, then gradually becoming mostly sunny, with a high near 20. Wind chill values between zero and 5. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday Night
Patchy blowing snow before 8pm. Partly cloudy, with a low around 7. Wind chill values between -5 and zero. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 26. Southwest wind 10 to 15 mph.
Tuesday Night
Mostly cloudy, with a steady temperature around 25. West wind 10 to 15 mph.
Wednesday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 26. Northwest wind 10 to 15 mph.
Wednesday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 7. Northwest wind around 5 mph.
New Year's Day
Sunny, with a high near 16.
Thursday Night
Partly cloudy, with a low around 6.
Friday
Partly sunny, with a high near 23.
Friday Night
Mostly cloudy, with a low around 12.
Saturday
Mostly sunny, with a high near 26.
Saturday Night
Mostly cloudy, with a low around 9.
Sunday
Partly sunny, with a high near 25.
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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:
3:16 pm CST Dec 28, 2025
Forecast Valid:
5pm CST Dec 28, 2025-6pm CST Jan 4, 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