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

Frigid Airmass to Bring Significantly Colder Temperatures; Snow Continues Downwind of the Great Lakes

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected in the Southeast by Tuesday morning. Moderate to heavy lake effect snow will continue downwind of the Great Lakes through Monday. Several inches of snow accumulation is expected, including in portions of the Chicago Metro Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

27°F

-3°C

Humidity 80%
Wind Speed N 17 G 24 mph
Barometer 30.24 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 9 Nov 11:35 pm CST
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 20. North northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 20 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 35. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 21. West northwest wind 5 to 10 mph becoming south southwest after midnight. Winds could gust as high as 15 mph.

    Low: 21 °F

    Increasing
    Clouds

  • Veterans Day

    Veterans Day: Cloudy, then gradually becoming mostly sunny, with a high near 42. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 42 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32. West wind around 10 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 20. North northwest wind around 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 35. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Increasing clouds, with a low around 21. West northwest wind 5 to 10 mph becoming south southwest after midnight. Winds could gust as high as 15 mph.
Veterans Day
Cloudy, then gradually becoming mostly sunny, with a high near 42. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 32. West wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 49.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
Mostly sunny, with a high near 52.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 57.
Friday Night
Mostly cloudy, with a low around 43.
Saturday
Mostly cloudy, with a high near 62.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 43.
Sunday
A chance of rain. Partly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
9:31 pm CST Nov 9, 2025
Forecast Valid:
11pm CST Nov 9, 2025-6pm CST Nov 16, 2025
 
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Additional Resources

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