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.

Partly Cloudy

18°F

-8°C

Humidity 68%
Wind Speed N 12 G 22 mph
Barometer 30.23 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill5°F (-15°C)
Last update 7 Dec 11:45 am CST
Extended Forecast for

South Beloit IL

  • This Afternoon

    This Afternoon: Patchy blowing snow. Sunny, with a temperature falling to around 10 by 5pm. Wind chill values as low as -3. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 23 °F⇓

    Patchy
    Blowing Snow

  • Tonight

    Tonight: Increasing clouds, with a temperature falling to near 4 by 8pm, then rising to around 11 during the remainder of the night. Wind chill values as low as -6. North northeast wind around 5 mph becoming calm after midnight.

    Low: 4 °F⇑

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, with a high near 22. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 22 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 14. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 14 °F

    Chance Snow

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 35. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 35 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain before 3am, then rain and snow likely. Low around 30. Chance of precipitation is 90%.

    Low: 30 °F

    Rain then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A chance of rain and snow showers before noon. Mostly cloudy, with a high near 33. Chance of precipitation is 30%.

    High: 33 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 13.

    Low: 13 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of snow after noon. Mostly cloudy, with a high near 24.

    High: 24 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

This Afternoon
Patchy blowing snow. Sunny, with a temperature falling to around 10 by 5pm. Wind chill values as low as -3. North wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Increasing clouds, with a temperature falling to near 4 by 8pm, then rising to around 11 during the remainder of the night. Wind chill values as low as -6. North northeast wind around 5 mph becoming calm after midnight.
Monday
Mostly cloudy, with a high near 22. Light and variable wind becoming south 5 to 10 mph in the morning.
Monday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 14. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 35. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Rain before 3am, then rain and snow likely. Low around 30. Chance of precipitation is 90%.
Wednesday
A chance of rain and snow showers before noon. Mostly cloudy, with a high near 33. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 13.
Thursday
A chance of snow after noon. Mostly cloudy, with a high near 24.
Thursday Night
A chance of snow before midnight. Mostly cloudy, with a low around 4.
Friday
Partly sunny, with a high near 14.
Friday Night
Mostly cloudy, with a low around -4.
Saturday
Partly sunny and cold, with a high near 10.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.47°N 89.02°W
Last Update:
12:00 pm CST Dec 7, 2025
Forecast Valid:
12pm 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