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

-8°F

-22°C

Humidity 84%
Wind Speed NW 6 mph
Barometer 30.30 in
Dewpoint -11°F (-24°C)
Visibility 10.00 mi
Wind Chill-21°F (-29°C)
Last update 29 Jan 5:45 am CST
Extended Forecast for

South Beloit IL

  • Today

    Today: Sunny, with a high near 13. Wind chill values as low as -13. North northwest wind around 5 mph.

    High: 13 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around -1. Wind chill values as low as -11. North northwest wind around 5 mph, with gusts as high as 10 mph.

    Low: -1 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of snow showers between 9am and noon. Mostly sunny, with a high near 15. Wind chill values as low as -12. North wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 15 °F

    Slight Chance
    Snow Showers
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 4. Wind chill values as low as -8. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 4 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 20. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 20 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 3.

    Low: 3 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A chance of snow. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Chance Snow

  • Monday

    Monday: Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 13. Wind chill values as low as -13. North northwest wind around 5 mph.
Tonight
Mostly clear, with a low around -1. Wind chill values as low as -11. North northwest wind around 5 mph, with gusts as high as 10 mph.
Friday
A slight chance of snow showers between 9am and noon. Mostly sunny, with a high near 15. Wind chill values as low as -12. North wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 4. Wind chill values as low as -8. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 20. North northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Mostly clear, with a low around 3.
Sunday
A 20 percent chance of snow after noon. Mostly sunny, with a high near 25.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 16.
Monday
Mostly cloudy, with a high near 28.
Monday Night
Mostly cloudy, with a low around 13.
Tuesday
Partly sunny, with a high near 26.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 14.
Wednesday
A chance of snow. Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
5:41 am CST Jan 29, 2026
Forecast Valid:
6am CST Jan 29, 2026-6pm CST Feb 4, 2026
 
Forecast Discussion
 
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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