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.

Mostly Cloudy

57°F

14°C

Humidity 31%
Wind Speed W 12 G 17 mph
Barometer 30.00 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 2 May 4:45 pm CDT
Extended Forecast for

4 Miles W Fort Atkinson WI

  • Tonight

    Tonight: Increasing clouds, with a low around 43. Southwest wind 5 to 10 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of showers before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 65. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 65 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. West wind 5 to 10 mph.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 74. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 74 °F

    Sunny then
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Southwest wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 50%.

    Low: 45 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers. Mostly cloudy, with a high near 56. North wind 5 to 10 mph.

    High: 56 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 37. Northwest wind around 5 mph becoming calm in the evening.

    Low: 37 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 56. Calm wind becoming north around 5 mph in the morning.

    High: 56 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 43. Southwest wind 5 to 10 mph.
Sunday
A 20 percent chance of showers before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 65. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 42. West wind 5 to 10 mph.
Monday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 74. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Southwest wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 50%.
Tuesday
A 30 percent chance of showers. Mostly cloudy, with a high near 56. North wind 5 to 10 mph.
Tuesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 37. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
Partly sunny, with a high near 56. Calm wind becoming north around 5 mph in the morning.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 38.
Thursday
A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 58.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 37.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 64.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 42.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Fort Atkinson WI
 42.93°N 88.93°W (Elev. 853 ft)
Last Update:
3:32 pm CDT May 2, 2026
Forecast Valid:
5pm CDT May 2, 2026-6pm CDT May 9, 2026
 
Forecast Discussion
 
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Additional Resources

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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