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.

Partly Cloudy

36°F

2°C

Humidity 52%
Wind Speed N 14 G 18 mph
Barometer 30.03 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 6 Feb 4:45 pm CST
Extended Forecast for

Janesville WI

  • Tonight

    Tonight: Mostly clear, with a low around 4. North wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.

    Low: 4 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 21. Wind chill values between -5 and 5. North wind around 5 mph becoming calm in the morning.

    High: 21 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 16. Southeast wind around 5 mph.

    Low: 16 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 30. Southeast wind 5 to 10 mph.

    High: 30 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 20. Southeast wind around 5 mph becoming south after midnight.

    Low: 20 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 40. Southwest wind around 5 mph.

    High: 40 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29. Northwest wind around 5 mph becoming calm.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Partly sunny, with a high near 45. Southeast wind 5 to 10 mph becoming north in the afternoon.

    High: 45 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 4. North wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.
Saturday
Increasing clouds, with a high near 21. Wind chill values between -5 and 5. North wind around 5 mph becoming calm in the morning.
Saturday Night
Mostly cloudy, with a low around 16. Southeast wind around 5 mph.
Sunday
Partly sunny, with a high near 30. Southeast wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 20. Southeast wind around 5 mph becoming south after midnight.
Monday
Partly sunny, with a high near 40. Southwest wind around 5 mph.
Monday Night
Partly cloudy, with a low around 29. Northwest wind around 5 mph becoming calm.
Tuesday
A 20 percent chance of rain after noon. Partly sunny, with a high near 45. Southeast wind 5 to 10 mph becoming north in the afternoon.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 29.
Wednesday
A slight chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 36. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 23.
Thursday
A 20 percent chance of snow. Mostly cloudy, with a high near 35.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 22.
Friday
Mostly sunny, with a high near 38.
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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:
1:57 pm CST Feb 6, 2026
Forecast Valid:
5pm CST Feb 6, 2026-6pm CST Feb 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation