National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Weekend Storm Impacts

A storm and trailing cold front will continue to slowly move through the Gulf Coast and Southeast U.S. through this weekend with widespread rain showers and isolated thunderstorms. A fast-moving clipper storm may bring several inches of snow to the north-central Plains, Midwest, eastern Great Lakes, and Northeast regions this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Light Snow

23°F

-5°C

Humidity 93%
Wind Speed NE 6 mph
Barometer 29.99 in
Dewpoint 21°F (-6°C)
Visibility 0.75 mi
Wind Chill16°F (-9°C)
Last update 6 Dec 11:35 pm CST
Extended Forecast for

South Beloit IL

Winter Weather Advisory until December 7, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 7, 06:00am

    NOW until 6:00am Sun

    Winter Weather Advisory

  • Overnight

    Low: 22 °F

    Heavy Snow

  • Sunday

    Sunday: A 20 percent chance of snow before 9am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 12 by 5pm. Wind chill values as low as zero. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 20 °F⇓

    Slight Chance
    Snow then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 0. Wind chill values as low as -7. North wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 0 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 21. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 21 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 13. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 13 °F

    Chance Snow

  • Tuesday

    Tuesday: A slight chance of rain and snow after noon. Mostly cloudy, with a high near 36. Chance of precipitation is 20%.

    High: 36 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow. Low around 30. Chance of precipitation is 90%.

    Low: 30 °F

    Rain/Snow
    then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A chance of snow before noon. Mostly cloudy, with a high near 33.

    High: 33 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Snow. The snow could be heavy at times. Steady temperature around 22. North northeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 5 inches possible.
Sunday
A 20 percent chance of snow before 9am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 12 by 5pm. Wind chill values as low as zero. North wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 0. Wind chill values as low as -7. North wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Monday
Partly sunny, with a high near 21. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 13. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
A slight chance of rain and snow after noon. Mostly cloudy, with a high near 36. Chance of precipitation is 20%.
Tuesday Night
Rain, possibly mixed with snow. Low around 30. Chance of precipitation is 90%.
Wednesday
A chance of snow before noon. Mostly cloudy, with a high near 33.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 14.
Thursday
A chance of snow. Mostly cloudy, with a high near 24.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 5.
Friday
Partly sunny, with a high near 14.
Friday Night
Mostly cloudy, with a low around -3.
Saturday
Partly sunny and cold, with a high near 9.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
9:11 pm CST Dec 6, 2025
Forecast Valid:
12am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
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