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.

Partly Cloudy

81°F

27°C

Humidity 58%
Wind Speed E 9 mph
Barometer 30.10 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 6 Sep 3:45 pm CDT
Extended Forecast for

Darien WI

  • Tonight

    Tonight: Mostly clear, with a low around 58. East wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Labor Day

    Labor Day: Mostly sunny, with a high near 79. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. East wind around 5 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 82. South wind 5 to 10 mph.

    High: 82 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 68. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Slight Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a high near 82. West wind 10 to 15 mph. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. West wind 5 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 76. Light northwest wind increasing to 5 to 10 mph in the morning.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 58. East wind around 5 mph becoming calm in the evening.
Labor Day
Mostly sunny, with a high near 79. Light east wind becoming southeast 5 to 10 mph in the morning.
Monday Night
Partly cloudy, with a low around 58. East wind around 5 mph.
Tuesday
Partly sunny, with a high near 82. South wind 5 to 10 mph.
Tuesday Night
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 68. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a high near 82. West wind 10 to 15 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 57. West wind 5 to 10 mph.
Thursday
Sunny, with a high near 76. Light northwest wind increasing to 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 78.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 59.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
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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:
3:32 pm CDT Sep 6, 2026
Forecast Valid:
3pm CDT Sep 6, 2026-6pm CDT Sep 13, 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