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.

Fair

28°F

-2°C

Humidity 80%
Wind Speed NW 3 mph
Barometer 30.02 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 17 Nov 12:55 am CST
Extended Forecast for

Janesville WI

  • Overnight

    Overnight: Clear, with a low around 25. Calm wind.

    Low: 25 °F

    Clear

  • Monday

    Monday: A 20 percent chance of rain after 4pm. Increasing clouds, with a high near 46. Calm wind becoming southeast around 5 mph.

    High: 46 °F

    Sunny then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Rain and snow before 4am, then snow between 4am and 5am, then rain and snow after 5am. Low around 35. East wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 35 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Tuesday

    Tuesday: Rain and snow, becoming all rain after 9am. High near 42. East wind around 10 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 42 °F

    Rain/Snow
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. East wind around 5 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 46. Calm wind becoming southeast around 5 mph.

    High: 46 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely, mainly after noon. Mostly cloudy, with a high near 51. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Rain Likely

Detailed Forecast

Overnight
Clear, with a low around 25. Calm wind.
Monday
A 20 percent chance of rain after 4pm. Increasing clouds, with a high near 46. Calm wind becoming southeast around 5 mph.
Monday Night
Rain and snow before 4am, then snow between 4am and 5am, then rain and snow after 5am. Low around 35. East wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Tuesday
Rain and snow, becoming all rain after 9am. High near 42. East wind around 10 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Tuesday Night
Mostly cloudy, with a low around 34. East wind around 5 mph becoming calm in the evening.
Wednesday
Cloudy, with a high near 46. Calm wind becoming southeast around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 36. Calm wind.
Thursday
Rain likely, mainly after noon. Mostly cloudy, with a high near 51. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 50.
Friday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 32.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
Last Update:
12:09 am CST Nov 17, 2025
Forecast Valid:
1am CST Nov 17, 2025-6pm CST Nov 23, 2025
 
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