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.

Overcast

19°F

-7°C

Humidity 49%
Wind Speed S 9 mph
Barometer 30.14 in
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 17 Mar 4:45 pm CDT
Extended Forecast for

Darien WI

  • Tonight

    Tonight: Snow before 4am, then snow, possibly mixed with freezing rain. Low around 17. South wind 5 to 10 mph. Chance of precipitation is 90%. Little or no ice accumulation expected. Total nighttime snow accumulation of around an inch possible.

    Low: 17 °F

    Snow Likely
    then Wintry
    Mix

  • Wednesday

    Wednesday: Areas of snow and freezing rain before 7am. Mostly cloudy, with a high near 38. Southwest wind around 10 mph. Chance of precipitation is 30%.

    High: 38 °F

    Areas Wintry
    Mix then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 32. Southwest wind around 5 mph.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 44. South wind around 5 mph becoming north in the afternoon.

    High: 44 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 32. Northeast wind around 5 mph becoming calm in the evening.

    Low: 32 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, with a high near 54. Southwest wind 5 to 10 mph.

    High: 54 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36. Northwest wind around 5 mph becoming east after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 64. Southwest wind 5 to 10 mph.

    High: 64 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow before 4am, then snow, possibly mixed with freezing rain. Low around 17. South wind 5 to 10 mph. Chance of precipitation is 90%. Little or no ice accumulation expected. Total nighttime snow accumulation of around an inch possible.
Wednesday
Areas of snow and freezing rain before 7am. Mostly cloudy, with a high near 38. Southwest wind around 10 mph. Chance of precipitation is 30%.
Wednesday Night
A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 32. Southwest wind around 5 mph.
Thursday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 44. South wind around 5 mph becoming north in the afternoon.
Thursday Night
Increasing clouds, with a low around 32. Northeast wind around 5 mph becoming calm in the evening.
Friday
Mostly cloudy, with a high near 54. Southwest wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 36. Northwest wind around 5 mph becoming east after midnight.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 64. Southwest wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Partly sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Partly sunny, with a high near 41.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 47.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
2:27 pm CDT Mar 17, 2026
Forecast Valid:
5pm CDT Mar 17, 2026-6pm CDT Mar 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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