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.

Light Snow

16°F

-9°C

Humidity 73%
Wind Speed W 15 G 20 mph
Barometer 29.95 in
Dewpoint 9°F (-13°C)
Visibility 5.00 mi
Wind Chill1°F (-17°C)
Last update 17 Jan 12:45 pm CST
Extended Forecast for

South Beloit IL

  • This Afternoon

    This Afternoon: Snow. High near 19. Wind chill values as low as 1. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. Total daytime snow accumulation of around an inch possible.

    High: 19 °F

    Snow

  • Tonight

    Tonight: Snow likely before 8pm, then scattered snow showers between 8pm and 10pm, then scattered flurries after 10pm. Mostly cloudy, with a 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 60%. New snow accumulation of less than a half inch possible.

    Low: 6 °F

    Snow Likely
    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. 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.

    Low: -3 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 20.

    High: 20 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 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

Detailed Forecast

This Afternoon
Snow. High near 19. Wind chill values as low as 1. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. Total daytime snow accumulation of around an inch possible.
Tonight
Snow likely before 8pm, then scattered snow showers between 8pm and 10pm, then scattered flurries after 10pm. Mostly cloudy, with a 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 60%. New 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. 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.
Tuesday
Mostly sunny, with a high near 20.
Tuesday Night
A 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.
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ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
1:26 pm CST Jan 17, 2026
Forecast Valid:
1pm CST Jan 17, 2026-6pm CST Jan 23, 2026
 
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Additional Resources

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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