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

28°F

-2°C

Humidity 80%
Wind Speed W 7 mph
Barometer 29.54 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 25 Feb 12:15 am CST
Extended Forecast for

Darien WI

  • Overnight

    Overnight: Mostly clear, with a low around 19. West wind 10 to 15 mph.

    Low: 19 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 30. Northwest wind 5 to 15 mph.

    High: 30 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15. Northwest wind around 5 mph becoming calm in the evening.

    Low: 15 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 41. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27. Southwest wind around 5 mph.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 57 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25. West wind around 10 mph becoming northwest after midnight.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow. Mostly cloudy, with a high near 33. North wind around 10 mph.

    High: 33 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 15.

    Low: 15 °F

    Slight Chance
    Snow then
    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 19. West wind 10 to 15 mph.
Wednesday
Sunny, with a high near 30. Northwest wind 5 to 15 mph.
Wednesday Night
Partly cloudy, with a low around 15. Northwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 41. Light south wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 27. Southwest wind around 5 mph.
Friday
Sunny, with a high near 57. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
Partly cloudy, with a low around 25. West wind around 10 mph becoming northwest after midnight.
Saturday
A 50 percent chance of snow. Mostly cloudy, with a high near 33. North wind around 10 mph.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 15.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 28.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 16.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 32.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 17.
Tuesday
A 30 percent chance of snow. Partly sunny, with a high near 38.
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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:
12:22 am CST Feb 25, 2026
Forecast Valid:
12am CST Feb 25, 2026-6pm CST Mar 3, 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