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

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

23°F

-5°C

Humidity 58%
Wind Speed NE 9 mph
Barometer 30.26 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 3 Feb 2:45 pm CST
Extended Forecast for

Darien WI

  • Tonight

    Tonight: Mostly clear, with a low around 3. North wind around 5 mph becoming calm in the evening.

    Low: 3 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 23. Wind chill values between zero and 10. North wind around 5 mph.

    High: 23 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 8. Calm wind becoming southwest around 5 mph after midnight.

    Low: 8 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 31. Southwest wind 5 to 15 mph.

    High: 31 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 25. West wind 5 to 15 mph.

    Low: 25 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday

    Friday: Mostly cloudy, with a high near 37. Northwest wind around 15 mph.

    High: 37 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 8. North wind 5 to 10 mph.

    Low: 8 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 26. North wind around 5 mph becoming south in the afternoon.

    High: 26 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 3. North wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 23. Wind chill values between zero and 10. North wind around 5 mph.
Wednesday Night
Increasing clouds, with a low around 8. Calm wind becoming southwest around 5 mph after midnight.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 31. Southwest wind 5 to 15 mph.
Thursday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 25. West wind 5 to 15 mph.
Friday
Mostly cloudy, with a high near 37. Northwest wind around 15 mph.
Friday Night
Partly cloudy, with a low around 8. North wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 26. North wind around 5 mph becoming south in the afternoon.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.
Sunday
Partly sunny, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 17.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Partly sunny, with a high near 39.
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:
3:02 pm CST Feb 3, 2026
Forecast Valid:
3pm CST Feb 3, 2026-6pm CST Feb 10, 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