National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

45°F

7°C

Humidity 87%
Wind Speed Calm
Barometer 30.01 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 31 Mar 9:10 pm CDT
Extended Forecast for

5 Miles SSW Janesville WI

  • Tonight

    Tonight: Increasing clouds, with a low around 34. Northeast wind around 10 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 44. East wind around 15 mph.

    High: 44 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Rain likely, then rain and possibly a thunderstorm after 1am. Low around 37. East wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Chance Rain
    then Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 67. Windy, with an east wind 15 to 25 mph becoming south in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 67 °F

    Rain and
    Windy

  • Thursday Night

    Thursday Night: A chance of rain and thunderstorms before 10pm, then a chance of rain between 10pm and 1am. Mostly cloudy, with a low around 41. Breezy, with a west wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 50%.

    Low: 41 °F

    Chance Rain
    and Breezy

  • Friday

    Friday: A 20 percent chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 63. West wind 5 to 10 mph becoming southeast in the afternoon.

    High: 63 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm. Low around 44. East wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 44 °F

    Rain

  • Saturday

    Saturday: A 40 percent chance of rain. Cloudy, with a high near 56. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 56 °F

    Chance Rain
    and Breezy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 31. Breezy.

    Low: 31 °F

    Slight Chance
    Rain and
    Breezy

Detailed Forecast

Tonight
Increasing clouds, with a low around 34. Northeast wind around 10 mph.
Wednesday
Mostly cloudy, with a high near 44. East wind around 15 mph.
Wednesday Night
Rain likely, then rain and possibly a thunderstorm after 1am. Low around 37. East wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Rain and possibly a thunderstorm. High near 67. Windy, with an east wind 15 to 25 mph becoming south in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A chance of rain and thunderstorms before 10pm, then a chance of rain between 10pm and 1am. Mostly cloudy, with a low around 41. Breezy, with a west wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
Friday
A 20 percent chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 63. West wind 5 to 10 mph becoming southeast in the afternoon.
Friday Night
Rain and possibly a thunderstorm. Low around 44. East wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A 40 percent chance of rain. Cloudy, with a high near 56. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 31. Breezy.
Sunday
Partly sunny, with a high near 48. Breezy.
Sunday Night
Mostly clear, with a low around 29.
Monday
Mostly sunny, with a high near 54.
Monday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 36.
Tuesday
Mostly cloudy, with a high near 54.
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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:
8:37 pm CDT Mar 31, 2026
Forecast Valid:
9pm CDT Mar 31, 2026-6pm CDT Apr 7, 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