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

79°F

26°C

Humidity 54%
Wind Speed SE 7 mph
Barometer 30.17 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 7 Sep 1:45 pm CDT
Extended Forecast for

5 Miles SSW Janesville WI

  • Labor Day

    Labor Day: Sunny, with a high near 80. Southeast wind 5 to 10 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Southeast wind 5 to 10 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after 3pm. Partly sunny, with a high near 84. South wind 5 to 10 mph.

    High: 84 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 67. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before noon, then a slight chance of showers between noon and 1pm. Mostly cloudy, with a high near 80. West wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. West wind 5 to 10 mph becoming light northwest after midnight.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. Light northwest wind increasing to 5 to 10 mph in the morning.

    High: 77 °F

    Sunny

  • Thursday Night

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

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Labor Day
Sunny, with a high near 80. Southeast wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 58. Southeast wind 5 to 10 mph.
Tuesday
A 20 percent chance of showers after 3pm. Partly sunny, with a high near 84. South wind 5 to 10 mph.
Tuesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 67. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers between noon and 1pm. Mostly cloudy, with a high near 80. West wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Mostly clear, with a low around 55. West wind 5 to 10 mph becoming light northwest after midnight.
Thursday
Sunny, with a high near 77. Light northwest wind increasing to 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 53. Calm wind.
Friday
Sunny, with a high near 79.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 60. Chance of precipitation is 40%.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 81.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 57.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
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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:
1:34 pm CDT Sep 7, 2026
Forecast Valid:
2pm CDT Sep 7, 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