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

63°F

17°C

Humidity 88%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 6 Sep 9:50 pm CDT
Extended Forecast for

5 Miles SSW Janesville WI

  • Tonight

    Tonight: Partly cloudy, with a low around 56. East wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.

    High: 79 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 57. East wind 5 to 10 mph.

    Low: 57 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 83. South wind 10 to 15 mph.

    High: 83 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 67. Southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 67 °F

    Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. West wind 10 to 15 mph. Chance of precipitation is 30%.

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

    High: 76 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 56. East wind around 5 mph becoming calm in the evening.
Labor Day
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79. Southeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 57. East wind 5 to 10 mph.
Tuesday
Partly sunny, with a high near 83. South wind 10 to 15 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 67. Southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. West wind 10 to 15 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 57. West wind 5 to 10 mph.
Thursday
Mostly 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 79.
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 40 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:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 ft)
Last Update:
9:46 pm CDT Sep 6, 2026
Forecast Valid:
10pm 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