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.

Mostly Cloudy

55°F

13°C

Humidity 44%
Wind Speed SE 12 mph
Barometer 30.29 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 11 Apr 3:45 pm CDT
Extended Forecast for

Janesville WI

  • Tonight

    Tonight: Showers and thunderstorms likely before 10pm, then showers likely between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 47. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 73. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%.

    High: 73 °F

    Breezy.
    Chance
    T-storms then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Low around 60. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Showers and
    Breezy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms before 7am. Mostly cloudy, with a high near 77. Southwest wind around 10 mph.

    High: 77 °F

    Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind around 10 mph.

    Low: 63 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of thunderstorms before 7am, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Southwest wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 61. Southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Southwest wind 10 to 15 mph.

    High: 75 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.

    Low: 55 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely before 10pm, then showers likely between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 47. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 73. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%.
Sunday Night
Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Low around 60. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
A 30 percent chance of showers and thunderstorms before 7am. Mostly cloudy, with a high near 77. Southwest wind around 10 mph.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind around 10 mph.
Tuesday
A slight chance of thunderstorms before 7am, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Southwest wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 61. Southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Southwest wind 10 to 15 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 75.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 55.
Friday
A 50 percent chance of showers. Mostly sunny, with a high near 77.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 58.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
Last Update:
3:32 pm CDT Apr 11, 2026
Forecast Valid:
4pm CDT Apr 11, 2026-6pm CDT Apr 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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