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.

Mostly Cloudy

48°F

9°C

Humidity 71%
Wind Speed NE 18 G 32 mph
Barometer 29.72 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 22 Mar 6:45 am CDT
Extended Forecast for

Darien WI

  • Today

    Today: A chance of sprinkles with a slight chance of rain before 3pm, then a chance of sprinkles between 3pm and 4pm. Mostly cloudy, with a temperature falling to around 41 by 5pm. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 46 °F⇓

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tonight

    Tonight: Partly cloudy, with a low around 25. North wind 5 to 15 mph.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 45. North wind around 5 mph.

    High: 45 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 29. East wind around 5 mph becoming south after midnight.

    Low: 29 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54. South wind 5 to 10 mph.

    High: 54 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. South wind around 5 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56. Southeast wind 5 to 10 mph.

    High: 56 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 42. Southeast wind 5 to 10 mph.

    Low: 42 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 1pm. Partly sunny, with a high near 62.

    High: 62 °F

    Chance Rain

Detailed Forecast

Today
A chance of sprinkles with a slight chance of rain before 3pm, then a chance of sprinkles between 3pm and 4pm. Mostly cloudy, with a temperature falling to around 41 by 5pm. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 25. North wind 5 to 15 mph.
Monday
Sunny, with a high near 45. North wind around 5 mph.
Monday Night
Increasing clouds, with a low around 29. East wind around 5 mph becoming south after midnight.
Tuesday
Mostly cloudy, with a high near 54. South wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 38. South wind around 5 mph.
Wednesday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56. Southeast wind 5 to 10 mph.
Wednesday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 42. Southeast wind 5 to 10 mph.
Thursday
A 30 percent chance of rain, mainly before 1pm. Partly sunny, with a high near 62.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 25.
Saturday
Sunny, with a high near 50.
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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:
6:26 am CDT Mar 22, 2026
Forecast Valid:
7am CDT Mar 22, 2026-6pm CDT Mar 28, 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