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.

Partly Cloudy

48°F

9°C

Humidity 82%
Wind Speed N 15 mph
Barometer 29.88 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 31 Mar 4:45 pm CDT
Extended Forecast for

Darien WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. Northeast wind 10 to 15 mph.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Isolated showers after 5pm. Mostly cloudy, with a high near 43. Breezy, with an east wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 10%.

    High: 43 °F

    Mostly Cloudy
    then Isolated
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Isolated showers before 7pm, then rain between 7pm and 1am, then rain and possibly a thunderstorm after 1am. Low around 36. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Showers

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 70. Breezy, with an east wind 15 to 20 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F

    Rain and
    Breezy

  • Thursday Night

    Thursday Night: A chance of rain and thunderstorms before 10pm, then a chance of rain between 10pm and 1am. Mostly cloudy, with a low around 42. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.

    Low: 42 °F

    Chance Rain
    and Breezy

  • Friday

    Friday: A 20 percent chance of rain and thunderstorms after 1pm. Mostly sunny, with a high near 63. West wind 5 to 10 mph becoming southeast in the afternoon.

    High: 63 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm. Low around 43. East wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Rain

  • Saturday

    Saturday: A 50 percent chance of rain. Cloudy, with a high near 57. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 57 °F

    Chance Rain
    and Breezy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 30. Breezy.

    Low: 30 °F

    Slight Chance
    Rain and
    Breezy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. Northeast wind 10 to 15 mph.
Wednesday
Isolated showers after 5pm. Mostly cloudy, with a high near 43. Breezy, with an east wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 10%.
Wednesday Night
Isolated showers before 7pm, then rain between 7pm and 1am, then rain and possibly a thunderstorm after 1am. Low around 36. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Rain and possibly a thunderstorm. High near 70. Breezy, with an east wind 15 to 20 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A chance of rain and thunderstorms before 10pm, then a chance of rain between 10pm and 1am. Mostly cloudy, with a low around 42. Breezy, with a west wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Friday
A 20 percent chance of rain and thunderstorms after 1pm. Mostly sunny, with a high near 63. West wind 5 to 10 mph becoming southeast in the afternoon.
Friday Night
Rain and possibly a thunderstorm. Low around 43. East wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 50 percent chance of rain. Cloudy, with a high near 57. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 30. Breezy.
Sunday
Partly sunny, with a high near 47. Breezy.
Sunday Night
Mostly clear, with a low around 28.
Monday
Mostly sunny, with a high near 54.
Monday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 53.
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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:
3:37 pm CDT Mar 31, 2026
Forecast Valid:
5pm CDT Mar 31, 2026-6pm CDT Apr 7, 2026
 
Forecast Discussion
 
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Additional Resources

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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