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.

Partly Cloudy and Breezy

63°F

17°C

Humidity 49%
Wind Speed SW 21 G 26 mph
Barometer 29.85 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 16 Feb 1:45 pm CST
Extended Forecast for

5 Miles SSW Janesville WI

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 63. West wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Mostly Sunny

  • Tonight

    Tonight: Scattered sprinkles between 8pm and 10pm. Mostly cloudy, with a low around 38. Calm wind becoming east around 5 mph after midnight.

    Low: 38 °F

    Scattered
    Sprinkles

  • Tuesday

    Tuesday: A 20 percent chance of rain after 5pm. Mostly cloudy, with a high near 54. Southeast wind 5 to 15 mph.

    High: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain likely, with thunderstorms also possible after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 48. Southeast wind around 15 mph becoming southwest after midnight. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Rain Likely

  • Wednesday

    Wednesday: Sunny, with a high near 60. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 60 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35. West wind 5 to 10 mph becoming southeast after midnight.

    Low: 35 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of rain after noon. Mostly sunny, with a high near 54. East wind 5 to 15 mph.

    High: 54 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain before midnight, then rain and snow likely. Some thunder is also possible. Low around 33. East wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 33 °F

    Rain then
    Rain/Snow
    Likely

  • Friday

    Friday: A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.

    High: 39 °F

    Chance
    Rain/Snow
    then Chance
    Snow

Detailed Forecast

Washington's Birthday
Mostly sunny, with a high near 63. West wind 5 to 15 mph, with gusts as high as 25 mph.
Tonight
Scattered sprinkles between 8pm and 10pm. Mostly cloudy, with a low around 38. Calm wind becoming east around 5 mph after midnight.
Tuesday
A 20 percent chance of rain after 5pm. Mostly cloudy, with a high near 54. Southeast wind 5 to 15 mph.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 48. Southeast wind around 15 mph becoming southwest after midnight. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Sunny, with a high near 60. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 35. West wind 5 to 10 mph becoming southeast after midnight.
Thursday
A 40 percent chance of rain after noon. Mostly sunny, with a high near 54. East wind 5 to 15 mph.
Thursday Night
Rain before midnight, then rain and snow likely. Some thunder is also possible. Low around 33. East wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 37.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Janesville WI
 42.63°N 89.04°W (Elev. 804 ft)
Last Update:
1:32 pm CST Feb 16, 2026
Forecast Valid:
2pm CST Feb 16, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation