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

61°F

16°C

Humidity 42%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 14 May 10:45 am CDT
Extended Forecast for

4 Miles NNW Darien WI

  • Today

    Today: Sunny, with a high near 70. South wind around 5 mph.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly between midnight and 5am. Increasing clouds, with a low around 48. South wind 5 to 10 mph.

    Low: 48 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 10 percent chance of showers before 7am. Mostly sunny, with a high near 76. South wind around 15 mph, with gusts as high as 25 mph.

    High: 76 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 56. South wind 5 to 15 mph.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 78. Southeast wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 59. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 59 °F

    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85. Breezy.

    High: 85 °F

    Breezy.
    Slight Chance
    T-storms then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 70. South wind around 5 mph.
Tonight
A 30 percent chance of showers, mainly between midnight and 5am. Increasing clouds, with a low around 48. South wind 5 to 10 mph.
Friday
A 10 percent chance of showers before 7am. Mostly sunny, with a high near 76. South wind around 15 mph, with gusts as high as 25 mph.
Friday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 56. South wind 5 to 15 mph.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 82. West wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 78. Southeast wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 59. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 85. Breezy.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77. Chance of precipitation is 60%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Wednesday
A 20 percent chance of showers. Partly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Darien WI
 42.66°N 88.74°W (Elev. 961 ft)
Last Update:
11:02 am CDT May 14, 2026
Forecast Valid:
11am CDT May 14, 2026-6pm CDT May 20, 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