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

23°F

-5°C

Humidity 86%
Wind Speed SE 13 mph
Barometer 30.31 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 8 Feb 8:45 am CST
Extended Forecast for

Janesville WI

  • Today

    Today: Mostly sunny, with a high near 33. Southeast wind 10 to 15 mph.

    High: 33 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 21. Southeast wind 5 to 10 mph.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 38. South wind 5 to 10 mph.

    High: 38 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32. South wind 5 to 10 mph becoming northwest after midnight.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 40. Northwest wind around 10 mph.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 22. Northwest wind around 5 mph.

    Low: 22 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 36. Northwest wind around 5 mph.

    High: 36 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23. Northwest wind around 5 mph becoming calm.

    Low: 23 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Chance Snow

Detailed Forecast

Today
Mostly sunny, with a high near 33. Southeast wind 10 to 15 mph.
Tonight
Mostly cloudy, with a low around 21. Southeast wind 5 to 10 mph.
Monday
Partly sunny, with a high near 38. South wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 32. South wind 5 to 10 mph becoming northwest after midnight.
Tuesday
Partly sunny, with a high near 40. Northwest wind around 10 mph.
Tuesday Night
Partly cloudy, with a low around 22. Northwest wind around 5 mph.
Wednesday
Sunny, with a high near 36. Northwest wind around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 23. Northwest wind around 5 mph becoming calm.
Thursday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 37.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 22.
Friday
A 20 percent chance of snow. Partly sunny, with a high near 39.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 24.
Saturday
A 30 percent chance of snow. Mostly sunny, with a high near 38.
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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:
7:42 am CST Feb 8, 2026
Forecast Valid:
8am CST Feb 8, 2026-6pm CST Feb 14, 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