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.

Overcast

54°F

12°C

Humidity 72%
Wind Speed NW 7 G 10 mph
Barometer 29.98 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 9 Apr 1:30 am CDT
Extended Forecast for

Darien WI

  • Overnight

    Overnight: Showers and possibly a thunderstorm before 4am, then scattered showers. Low around 46. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers

  • Thursday

    Thursday: Increasing clouds, with a high near 62. West wind 5 to 10 mph.

    High: 62 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Showers, mainly before 5am. Low around 42. Northwest wind around 5 mph becoming northeast after midnight. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 42 °F

    Showers

  • Friday

    Friday: A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 55. North wind 5 to 10 mph.

    High: 55 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 33. North wind around 5 mph becoming calm in the evening.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 57. Southeast wind 5 to 10 mph.

    High: 57 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely after 10pm. Mostly cloudy, with a low around 46. Southeast wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 60. Breezy. Chance of precipitation is 70%.

    Low: 60 °F

    Showers
    Likely and
    Breezy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm before 4am, then scattered showers. Low around 46. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Increasing clouds, with a high near 62. West wind 5 to 10 mph.
Thursday Night
Showers, mainly before 5am. Low around 42. Northwest wind around 5 mph becoming northeast after midnight. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday
A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 55. North wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 33. North wind around 5 mph becoming calm in the evening.
Saturday
Increasing clouds, with a high near 57. Southeast wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms, then showers likely after 10pm. Mostly cloudy, with a low around 46. Southeast wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 60. Breezy. Chance of precipitation is 70%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 76. Chance of precipitation is 30%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Tuesday
Showers and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 46. Chance of precipitation is 80%.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
1:21 am CDT Apr 9, 2026
Forecast Valid:
1am CDT Apr 9, 2026-6pm CDT Apr 15, 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