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

0°F

-18°C

Humidity 78%
Wind Speed W 8 mph
Barometer 30.19 in
Dewpoint -6°F (-21°C)
Visibility 10.00 mi
Wind Chill-14°F (-26°C)
Last update 28 Jan 7:45 am CST
Extended Forecast for

South Beloit IL

  • Today

    Today: Mostly sunny, with a high near 14. Wind chill values as low as -15. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 14 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around -3. Wind chill values as low as -12. West northwest wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.

    Low: -3 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 12. Wind chill values as low as -12. Calm wind becoming northwest around 5 mph in the morning.

    High: 12 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -3. Wind chill values as low as -15. Calm wind becoming north around 5 mph after midnight. Winds could gust as high as 15 mph.

    Low: -3 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 13. North wind around 10 mph, with gusts as high as 20 mph.

    High: 13 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 2.

    Low: 2 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 19.

    High: 19 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 4.

    Low: 4 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of snow after noon. Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny
    then Chance
    Snow

Detailed Forecast

Today
Mostly sunny, with a high near 14. Wind chill values as low as -15. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around -3. Wind chill values as low as -12. West northwest wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.
Thursday
Sunny, with a high near 12. Wind chill values as low as -12. Calm wind becoming northwest around 5 mph in the morning.
Thursday Night
Partly cloudy, with a low around -3. Wind chill values as low as -15. Calm wind becoming north around 5 mph after midnight. Winds could gust as high as 15 mph.
Friday
Mostly sunny, with a high near 13. North wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 2.
Saturday
Mostly sunny, with a high near 19.
Saturday Night
Mostly clear, with a low around 4.
Sunday
A chance of snow after noon. Mostly sunny, with a high near 24.
Sunday Night
A chance of snow before midnight. Mostly cloudy, with a low around 13.
Monday
Mostly cloudy, with a high near 27.
Monday Night
Mostly cloudy, with a low around 11.
Tuesday
Mostly cloudy, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
4:11 am CST Jan 28, 2026
Forecast Valid:
8am CST Jan 28, 2026-6pm CST Feb 3, 2026
 
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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