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.

Fair

3°F

-16°C

Humidity 55%
Wind Speed NW 17 G 23 mph
Barometer 30.25 in
Dewpoint -9°F (-23°C)
Visibility 10.00 mi
Wind Chill-17°F (-27°C)
Last update 19 Jan 2:45 pm CST
Extended Forecast for

South Beloit IL

  • M.L.King Day

    M.L.King Day: Patchy blowing snow. Partly sunny and cold, with a high near 5. Wind chill values as low as -15. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 5 °F

    Patchy
    Blowing Snow
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around -2. Wind chill values as low as -13. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: -2 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 17. Wind chill values as low as -12. West southwest wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.

    High: 17 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow, mainly after midnight. Low around 12. South wind around 5 mph becoming west southwest after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 12 °F

    Chance Snow
    then Snow

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 25. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 25 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of snow before midnight. Mostly cloudy, with a low around 6.

    Low: 6 °F

    Chance Snow
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 16.

    High: 16 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -11.

    Low: -11 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near -4.

    High: -4 °F

    Cold

Detailed Forecast

M.L.King Day
Patchy blowing snow. Partly sunny and cold, with a high near 5. Wind chill values as low as -15. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Partly cloudy, with a low around -2. Wind chill values as low as -13. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Increasing clouds, with a high near 17. Wind chill values as low as -12. West southwest wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Snow, mainly after midnight. Low around 12. South wind around 5 mph becoming west southwest after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Wednesday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 25. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 50 percent chance of snow before midnight. Mostly cloudy, with a low around 6.
Thursday
Mostly sunny, with a high near 16.
Thursday Night
Partly cloudy, with a low around -11.
Friday
Partly sunny and cold, with a high near -4.
Friday Night
Mostly cloudy, with a low around -17.
Saturday
Mostly sunny and cold, with a high near -1.
Saturday Night
Mostly cloudy, with a low around -12.
Sunday
Mostly sunny and cold, with a high near 8.
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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:
3:11 pm CST Jan 19, 2026
Forecast Valid:
3pm CST Jan 19, 2026-6pm CST Jan 25, 2026
 
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