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.

Partly Cloudy

34°F

1°C

Humidity 81%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 13 Feb 8:45 pm CST
Extended Forecast for

Janesville WI

  • Tonight

    Tonight: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 51. Calm wind becoming south around 5 mph.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. Southeast wind around 5 mph becoming calm.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 55. Calm wind becoming west around 5 mph.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. Calm wind becoming south around 5 mph after midnight.

    Low: 37 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 59. Southwest wind 5 to 10 mph.

    High: 59 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39. Southwest wind around 5 mph becoming east after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 53. East wind 5 to 15 mph.

    High: 53 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain likely. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.

    Low: 42 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 28. Calm wind.
Saturday
Mostly sunny, with a high near 51. Calm wind becoming south around 5 mph.
Saturday Night
Partly cloudy, with a low around 31. Southeast wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 55. Calm wind becoming west around 5 mph.
Sunday Night
Partly cloudy, with a low around 37. Calm wind becoming south around 5 mph after midnight.
Washington's Birthday
Mostly sunny, with a high near 59. Southwest wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 39. Southwest wind around 5 mph becoming east after midnight.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 53. East wind 5 to 15 mph.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.
Wednesday
A 50 percent chance of rain. Partly sunny, with a high near 54.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 31.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 43.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 50%.
Friday
A 30 percent chance of snow. Partly sunny, with a high near 37.
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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:
8:37 pm CST Feb 13, 2026
Forecast Valid:
8pm CST Feb 13, 2026-6pm CST Feb 20, 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