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

54°F

12°C

Humidity 35%
Wind Speed W 18 G 29 mph
Barometer 30.14 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 5 Apr 5:45 pm CDT
Extended Forecast for

Janesville WI

  • Tonight

    Tonight: Showers likely, mainly before 11pm. Increasing clouds, with a low around 35. West wind 5 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Showers
    Likely then
    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 45. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 45 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 22. North wind 5 to 10 mph.

    Low: 22 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 42 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of rain showers after 4am. Mostly cloudy, with a low around 31. Southeast wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 31 °F

    Slight Chance
    Snow Showers
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 64 °F

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Showers likely. Mostly cloudy, with a low around 51. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 51 °F

    Showers
    Likely and
    Breezy

  • Thursday

    Thursday: A 40 percent chance of showers. Mostly sunny, with a high near 64. Southwest wind 10 to 15 mph.

    High: 64 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly before 11pm. Increasing clouds, with a low around 35. West wind 5 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Partly sunny, with a high near 45. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 22. North wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 42. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
A slight chance of snow showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of rain showers after 4am. Mostly cloudy, with a low around 31. Southeast wind 5 to 10 mph. Chance of precipitation is 40%.
Wednesday
Mostly cloudy, with a high near 64. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 51. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A 40 percent chance of showers. Mostly sunny, with a high near 64. Southwest wind 10 to 15 mph.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 40.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 59.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 39.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 61.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 49.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
Last Update:
4:34 pm CDT Apr 5, 2026
Forecast Valid:
5pm CDT Apr 5, 2026-6pm CDT Apr 12, 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