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.

A Few Clouds

18°F

-8°C

Humidity 62%
Wind Speed N 6 mph
Barometer 30.31 in
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 3 Feb 6:45 pm CST
Extended Forecast for

Beloit WI

  • Tonight

    Tonight: Mostly clear, with a low around 4. North wind around 5 mph becoming calm in the evening.

    Low: 4 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 24. Wind chill values between zero and 10. Calm wind becoming north around 5 mph.

    High: 24 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 10. Calm wind becoming southwest around 5 mph after midnight.

    Low: 10 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 33. Southwest wind 5 to 10 mph.

    High: 33 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 27. West wind 5 to 10 mph.

    Low: 27 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday

    Friday: Partly sunny, with a high near 39. Northwest wind around 15 mph.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 11. North wind 5 to 10 mph.

    Low: 11 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 28. Northeast wind 5 to 10 mph becoming south in the afternoon.

    High: 28 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 4. North wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 24. Wind chill values between zero and 10. Calm wind becoming north around 5 mph.
Wednesday Night
Increasing clouds, with a low around 10. Calm wind becoming southwest around 5 mph after midnight.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 33. Southwest wind 5 to 10 mph.
Thursday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 27. West wind 5 to 10 mph.
Friday
Partly sunny, with a high near 39. Northwest wind around 15 mph.
Friday Night
Mostly clear, with a low around 11. North wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 28. Northeast wind 5 to 10 mph becoming south in the afternoon.
Saturday Night
Mostly cloudy, with a low around 21.
Sunday
Partly sunny, with a high near 32.
Sunday Night
Partly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 37.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Beloit WI
 42.52°N 89.02°W (Elev. 745 ft)
Last Update:
7:33 pm CST Feb 3, 2026
Forecast Valid:
7pm CST Feb 3, 2026-6pm CST Feb 10, 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