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

41°F

5°C

Humidity 93%
Wind Speed SE 12 mph
Barometer 29.86 in
Dewpoint 39°F (4°C)
Visibility 4.00 mi
Wind Chill34°F (1°C)
Last update 27 Dec 1:45 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: Cloudy, with a high near 42. Southeast wind around 10 mph.

    High: 42 °F

    Cloudy

  • Tonight

    Tonight: A chance of rain before 3am, then a slight chance of rain after 5am. Patchy fog. Otherwise, cloudy, with a low around 41. Southeast wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 41 °F

    Chance Rain
    and Patchy
    Fog

  • Sunday

    Sunday: Rain. Areas of fog before noon. High near 53. South wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 53 °F

    Rain and
    Areas Fog

  • Sunday Night

    Sunday Night: Rain before 7pm, then rain and snow between 7pm and 8pm, then snow after 8pm. Widespread blowing snow, mainly after 3am. Low around 14. Wind chill values between -5 and 5. Windy, with a west wind 20 to 25 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 14 °F

    Rain/Snow and
    Patchy
    Blowing Snow
    then Snow and
    Blowing Snow

  • Monday

    Monday: A 50 percent chance of snow before noon. Widespread blowing snow, mainly before 7am. Mostly cloudy, with a high near 21. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 45 mph.

    High: 21 °F

    Chance Snow
    and Blowing
    Snow

  • Monday Night

    Monday Night: Patchy blowing snow before 8pm. Partly cloudy, with a low around 7. 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 Mostly
    Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 24. West wind 10 to 15 mph.

    High: 24 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 18. West wind 10 to 15 mph.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

This Afternoon
Cloudy, with a high near 42. Southeast wind around 10 mph.
Tonight
A chance of rain before 3am, then a slight chance of rain after 5am. Patchy fog. Otherwise, cloudy, with a low around 41. Southeast wind 5 to 10 mph. Chance of precipitation is 40%.
Sunday
Rain. Areas of fog before noon. High near 53. South wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain before 7pm, then rain and snow between 7pm and 8pm, then snow after 8pm. Widespread blowing snow, mainly after 3am. Low around 14. Wind chill values between -5 and 5. Windy, with a west wind 20 to 25 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Monday
A 50 percent chance of snow before noon. Widespread blowing snow, mainly before 7am. Mostly cloudy, with a high near 21. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 45 mph.
Monday Night
Patchy blowing snow before 8pm. Partly cloudy, with a low around 7. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday
Increasing clouds, with a high near 24. West wind 10 to 15 mph.
Tuesday Night
Mostly cloudy, with a low around 18. West wind 10 to 15 mph.
Wednesday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 27.
Wednesday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.
New Year's Day
Mostly sunny, with a high near 16.
Thursday Night
Mostly clear, with a low around 4.
Friday
Mostly sunny, with a high near 21.
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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:
2:16 pm CST Dec 27, 2025
Forecast Valid:
2pm CST Dec 27, 2025-6pm CST Jan 2, 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