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.

Snow

16°F

-9°C

Humidity 79%
Wind Speed W 12 mph
Barometer 30.02 in
Dewpoint 10°F (-12°C)
Visibility 2.50 mi
Wind Chill3°F (-16°C)
Last update 17 Jan 5:45 pm CST
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Snow before 10pm, then a chance of flurries with a slight chance of snow between 10pm and 11pm, then a chance of flurries after 11pm. Low around 6. Wind chill values as low as -8. West wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 6 °F

    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Snow likely, mainly after 3pm. Mostly cloudy, with a high near 18. Wind chill values as low as -9. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 18 °F

    Mostly Cloudy
    then Snow
    Likely

  • Sunday Night

    Sunday Night: Snow likely, mainly before 9pm. Mostly cloudy, with a low around -1. Wind chill values as low as -22. Blustery, with a southwest wind 10 to 15 mph becoming west northwest 20 to 25 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: -1 °F

    Blustery.
    Snow Likely
    then Mostly
    Cloudy

  • M.L.King Day

    M.L.King Day: Mostly sunny and cold, with a high near 5. Wind chill values as low as -23. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 5 °F

    Cold and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around -3. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: -3 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 20.

    High: 20 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 12.

    Low: 12 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 24.

    High: 24 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 5.

    Low: 5 °F

    Partly Cloudy

Detailed Forecast

Tonight
Snow before 10pm, then a chance of flurries with a slight chance of snow between 10pm and 11pm, then a chance of flurries after 11pm. Low around 6. Wind chill values as low as -8. West wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Snow likely, mainly after 3pm. Mostly cloudy, with a high near 18. Wind chill values as low as -9. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Sunday Night
Snow likely, mainly before 9pm. Mostly cloudy, with a low around -1. Wind chill values as low as -22. Blustery, with a southwest wind 10 to 15 mph becoming west northwest 20 to 25 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
M.L.King Day
Mostly sunny and cold, with a high near 5. Wind chill values as low as -23. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around -3. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 20.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 12.
Wednesday
Mostly cloudy, with a high near 24.
Wednesday Night
Partly cloudy, with a low around 5.
Thursday
Mostly sunny, with a high near 17.
Thursday Night
Mostly cloudy, with a low around 7.
Friday
Partly sunny, with a high near 21.
Friday Night
Mostly cloudy, with a low around 0.
Saturday
A chance of snow. Mostly cloudy, with a high near 12.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
5:51 pm CST Jan 17, 2026
Forecast Valid:
6pm CST Jan 17, 2026-6pm CST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation