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 W 8 mph
Barometer 29.54 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 25 Feb 1:15 am CST
Extended Forecast for

Janesville WI

  • Overnight

    Overnight: Mostly clear, with a low around 20. West wind 5 to 15 mph.

    Low: 20 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 30. Northwest wind 5 to 15 mph.

    High: 30 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 16. Northwest wind around 5 mph becoming calm in the evening.

    Low: 16 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 42. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 42 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27. Southwest wind around 5 mph.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 58. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26. West wind 5 to 10 mph becoming northwest after midnight.

    Low: 26 °F

    Partly Cloudy

  • Saturday

    Saturday: Snow likely, mainly after noon. Mostly cloudy, with a high near 33. North wind around 10 mph. Chance of precipitation is 60%.

    High: 33 °F

    Chance Snow
    then Snow
    Likely

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 20. West wind 5 to 15 mph.
Wednesday
Sunny, with a high near 30. Northwest wind 5 to 15 mph.
Wednesday Night
Partly cloudy, with a low around 16. Northwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 42. Light south wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 27. Southwest wind around 5 mph.
Friday
Sunny, with a high near 58. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 26. West wind 5 to 10 mph becoming northwest after midnight.
Saturday
Snow likely, mainly after noon. Mostly cloudy, with a high near 33. North wind around 10 mph. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 15.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 29.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 17.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 33.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 17.
Tuesday
A 30 percent chance of snow. Partly sunny, with a high near 39.
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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:
1:32 am CST Feb 25, 2026
Forecast Valid:
1am CST Feb 25, 2026-6pm CST Mar 3, 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