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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

75°F

24°C

Humidity 94%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 3 Sep 10:55 pm CDT
Extended Forecast for

Fort Atkinson WI

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming south after midnight.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 88. Heat index values as high as 98. Southeast wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly between 8pm and 1am. Partly cloudy, with a low around 69. West wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the morning.

    High: 84 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 62. Northeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the morning.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 81. Calm wind becoming southeast around 5 mph in the morning.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming south after midnight.
Friday
A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 88. Heat index values as high as 98. Southeast wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 30%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly between 8pm and 1am. Partly cloudy, with a low around 69. West wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the morning.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 62. Northeast wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the morning.
Sunday Night
Partly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening.
Labor Day
Mostly sunny, with a high near 81. Calm wind becoming southeast around 5 mph in the morning.
Monday Night
Mostly cloudy, with a low around 63.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Thursday
A 20 percent chance of showers. Partly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Atkinson WI
 42.92°N 88.84°W (Elev. 797 ft)
Last Update:
10:41 pm CDT Sep 3, 2026
Forecast Valid:
11pm CDT Sep 3, 2026-6pm CDT Sep 10, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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