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.

A Few Clouds

63°F

17°C

Humidity 68%
Wind Speed W 5 mph
Barometer 29.64 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 16 Jun 8:45 pm CDT
Extended Forecast for

4 Miles WSW Fort Atkinson WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 52. Southwest wind 5 to 10 mph.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 66. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 66 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 54. Southeast wind 5 to 15 mph becoming west after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 72. Northwest wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 51. West wind 5 to 10 mph. Chance of precipitation is 10%.

    Low: 51 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 74. Northwest wind 5 to 10 mph.

    High: 74 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 53. West wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 77. West wind 5 to 10 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 52. Southwest wind 5 to 10 mph.
Wednesday
Showers and possibly a thunderstorm. High near 66. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 54. Southeast wind 5 to 15 mph becoming west after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 72. Northwest wind 10 to 15 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 51. West wind 5 to 10 mph. Chance of precipitation is 10%.
Juneteenth
Sunny, with a high near 74. Northwest wind 5 to 10 mph.
Friday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 53. West wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 77. West wind 5 to 10 mph.
Saturday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 55.
Sunday
A 50 percent chance of showers. Mostly cloudy, with a high near 73.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Fort Atkinson WI
 42.9°N 88.93°W (Elev. 774 ft)
Last Update:
8:37 pm CDT Jun 16, 2026
Forecast Valid:
8pm CDT Jun 16, 2026-6pm CDT Jun 23, 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