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

34°F

1°C

Humidity 56%
Wind Speed SE 12 mph
Barometer 30.40 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 2 Mar 9:45 am CST
Extended Forecast for

5 Miles SSW Janesville WI

  • Today

    Today: Sunny, with a high near 45. South wind 5 to 10 mph.

    High: 45 °F

    Sunny

  • Tonight

    Tonight: A slight chance of snow between 1am and 2am, then a slight chance of rain after 2am. Mostly cloudy, with a low around 29. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Tuesday

    Tuesday: A chance of freezing rain before 7am, then a chance of rain and snow between 7am and 8am, then a chance of rain after 8am. Mostly cloudy, with a high near 44. East wind around 5 mph. Chance of precipitation is 30%.

    High: 44 °F

    Chance Wintry
    Mix then
    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 31. Calm wind becoming east around 5 mph after midnight.

    Low: 31 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain, with thunderstorms also possible after 3pm. Mostly sunny, with a high near 49. East wind 5 to 10 mph. Chance of precipitation is 50%.

    High: 49 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 38 °F

    Chance
    T-storms then
    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before noon. Cloudy, with a high near 52. East wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 39. North wind around 5 mph becoming east after midnight.

    Low: 39 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Rain

Detailed Forecast

Today
Sunny, with a high near 45. South wind 5 to 10 mph.
Tonight
A slight chance of snow between 1am and 2am, then a slight chance of rain after 2am. Mostly cloudy, with a low around 29. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
A chance of freezing rain before 7am, then a chance of rain and snow between 7am and 8am, then a chance of rain after 8am. Mostly cloudy, with a high near 44. East wind around 5 mph. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of rain after midnight. Partly cloudy, with a low around 31. Calm wind becoming east around 5 mph after midnight.
Wednesday
A chance of rain, with thunderstorms also possible after 3pm. Mostly sunny, with a high near 49. East wind 5 to 10 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain likely, mainly before noon. Cloudy, with a high near 52. East wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 39. North wind around 5 mph becoming east after midnight.
Friday
Rain. High near 62. Chance of precipitation is 80%.
Friday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.
Saturday
A 20 percent chance of rain. Mostly cloudy, with a high near 56.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 61.
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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:
7:33 am CST Mar 2, 2026
Forecast Valid:
10am CST Mar 2, 2026-6pm CDT Mar 8, 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