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

34°F

1°C

Humidity 87%
Wind Speed Calm
Barometer 29.78 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 10 Feb 3:35 am CST
Extended Forecast for

Darien WI

  • Overnight

    Overnight: Cloudy early, then becoming partly cloudy, with a low around 32. Southwest wind around 10 mph.

    Low: 32 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 38. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 38 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23. Northwest wind around 10 mph.

    Low: 23 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 35. Northwest wind 5 to 10 mph.

    High: 35 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 20. Northwest wind around 5 mph becoming calm.

    Low: 20 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 37. Calm wind becoming south around 5 mph.

    High: 37 °F

    Cloudy then
    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight. Partly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 43. Calm wind becoming southwest around 5 mph in the morning.

    High: 43 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Overnight
Cloudy early, then becoming partly cloudy, with a low around 32. Southwest wind around 10 mph.
Tuesday
Partly sunny, with a high near 38. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 23. Northwest wind around 10 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 35. Northwest wind 5 to 10 mph.
Wednesday Night
Increasing clouds, with a low around 20. Northwest wind around 5 mph becoming calm.
Thursday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 37. Calm wind becoming south around 5 mph.
Thursday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around 23. Calm wind.
Friday
Sunny, with a high near 43. Calm wind becoming southwest around 5 mph in the morning.
Friday Night
Mostly clear, with a low around 25.
Saturday
Mostly sunny, with a high near 44.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 29.
Sunday
A 30 percent chance of rain. Mostly sunny, with a high near 43.
Sunday Night
Partly cloudy, with a low around 26.
Washington's Birthday
Partly sunny, with a high near 45.
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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:
3:34 am CST Feb 10, 2026
Forecast Valid:
3am CST Feb 10, 2026-6pm CST Feb 16, 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