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.

Overcast

52°F

11°C

Humidity 88%
Wind Speed SW 15 mph
Barometer 29.67 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 4 Nov 5:45 pm CST
Extended Forecast for

Janesville WI

  • Tonight

    Tonight: A chance of rain before 10pm, then a chance of sprinkles between 10pm and 2am, then a chance of rain after 2am. Cloudy, with a low around 45. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 45 °F

    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain between 2pm and 5pm. Cloudy, with a high near 52. Southwest wind around 10 mph becoming north in the afternoon.

    High: 52 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Cloudy, then gradually becoming partly cloudy, with a low around 35. North wind 10 to 15 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 47. North wind 5 to 15 mph.

    High: 47 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. North wind around 5 mph becoming calm in the evening.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 51. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31. West wind around 5 mph becoming calm.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57. West wind 5 to 10 mph.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of rain before 10pm, then a chance of sprinkles between 10pm and 2am, then a chance of rain after 2am. Cloudy, with a low around 45. Southwest wind 10 to 15 mph. Chance of precipitation is 30%.
Thursday
A 40 percent chance of rain between 2pm and 5pm. Cloudy, with a high near 52. Southwest wind around 10 mph becoming north in the afternoon.
Thursday Night
Cloudy, then gradually becoming partly cloudy, with a low around 35. North wind 10 to 15 mph.
Friday
Partly sunny, with a high near 47. North wind 5 to 15 mph.
Friday Night
Mostly clear, with a low around 27. North wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 51. Calm wind becoming northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 31. West wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 57. West wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 33.
Monday
Sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 36.
Veterans Day
Mostly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.69°N 89.01°W (Elev. 863 ft)
Last Update:
6:33 pm CST Nov 4, 2026
Forecast Valid:
6pm CST Nov 4, 2026-6pm CST Nov 11, 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