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.

Fair

5°F

-15°C

Humidity 66%
Wind Speed S 6 mph
Barometer 30.13 in
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-6°F (-21°C)
Last update 4 Dec 11:15 pm CST
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Patchy freezing fog between 1am and 3am. Mostly cloudy, with a temperature rising to around 8 by 4am. Wind chill values as low as -13. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: -1 °F⇑

    Patchy
    Freezing Fog

  • Friday

    Friday: Partly sunny, with a high near 27. Wind chill values as low as -4. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 27 °F

    Partly Sunny

  • Friday Night

    Friday Night: Patchy snow and freezing rain before midnight. Mostly cloudy, with a low around 21. Southwest wind 5 to 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 21 °F

    Patchy Wintry
    Mix then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 25. West northwest wind around 5 mph becoming north northeast in the afternoon. Winds could gust as high as 15 mph.

    High: 25 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 11. Calm wind becoming north northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%.

    Low: 11 °F

    Chance Snow
    then Snow
    Likely

  • Sunday

    Sunday: A 30 percent chance of snow before noon. Partly sunny, with a high near 20.

    High: 20 °F

    Chance Snow
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -4.

    Low: -4 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 20.

    High: 20 °F

    Partly Sunny

  • Monday Night

    Monday Night: Snow likely. Mostly cloudy, with a low around 12.

    Low: 12 °F

    Snow Likely

Detailed Forecast

Tonight
Patchy freezing fog between 1am and 3am. Mostly cloudy, with a temperature rising to around 8 by 4am. Wind chill values as low as -13. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
Partly sunny, with a high near 27. Wind chill values as low as -4. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
Patchy snow and freezing rain before midnight. Mostly cloudy, with a low around 21. Southwest wind 5 to 10 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 25. West northwest wind around 5 mph becoming north northeast in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 11. Calm wind becoming north northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%.
Sunday
A 30 percent chance of snow before noon. Partly sunny, with a high near 20.
Sunday Night
Partly cloudy, with a low around -4.
Monday
Partly sunny, with a high near 20.
Monday Night
Snow likely. Mostly cloudy, with a low around 12.
Tuesday
Mostly cloudy, with a high near 29.
Tuesday Night
Snow likely. Mostly cloudy, with a low around 18.
Wednesday
Snow likely. Mostly cloudy, with a high near 31.
Wednesday Night
Mostly cloudy, with a low around 6.
Thursday
Partly sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
9:16 pm CST Dec 4, 2025
Forecast Valid:
11pm CST Dec 4, 2025-6pm CST Dec 11, 2025
 
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Additional Resources

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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