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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update 7 Mar 8:45 am CST
Extended Forecast for

Janesville WI

  • Today

    Today: A 20 percent chance of showers before 10am. Mostly cloudy, with a temperature falling to around 43 by 5pm. West wind around 15 mph, with gusts as high as 25 mph.

    High: 58 °F⇓

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 33. West wind 5 to 15 mph becoming southwest after midnight.

    Low: 33 °F

    Gradual
    Clearing

  • Sunday

    Sunday: Sunny, with a high near 61. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 61 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68. Southwest wind 5 to 15 mph.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 40. West wind 5 to 10 mph becoming east after midnight.

    Low: 40 °F

    Clear

  • Tuesday

    Tuesday: Showers likely after noon. Increasing clouds, with a high near 58. East wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Sunny then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Rain before midnight, then rain and snow likely. Low around 33. North wind around 15 mph. 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

  • Wednesday

    Wednesday: A chance of rain and snow. Cloudy, with a high near 42. Chance of precipitation is 50%.

    High: 42 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
A 20 percent chance of showers before 10am. Mostly cloudy, with a temperature falling to around 43 by 5pm. West wind around 15 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 33. West wind 5 to 15 mph becoming southwest after midnight.
Sunday
Sunny, with a high near 61. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 45. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 68. Southwest wind 5 to 15 mph.
Monday Night
Clear, with a low around 40. West wind 5 to 10 mph becoming east after midnight.
Tuesday
Showers likely after noon. Increasing clouds, with a high near 58. East wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain before midnight, then rain and snow likely. Low around 33. North wind around 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of rain and snow. Cloudy, with a high near 42. Chance of precipitation is 50%.
Wednesday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around 24.
Thursday
Mostly sunny, with a high near 45.
Thursday Night
A chance of rain and snow. Cloudy, with a low around 33. Chance of precipitation is 40%.
Friday
A slight chance of rain and snow. Mostly cloudy, with a high near 52. Chance of precipitation is 20%.
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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:
8:53 am CST Mar 7, 2026
Forecast Valid:
9am CST Mar 7, 2026-6pm CDT Mar 13, 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