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.

Overcast and Breezy

19°F

-7°C

Humidity 68%
Wind Speed NW 22 G 28 mph
Barometer 29.88 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill2°F (-17°C)
Last update 16 Mar 7:45 pm CDT
Extended Forecast for

South Beloit IL

Winter Weather Advisory March 16, 08:47pm until March 17, 12:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory March 16, 08:47pm until March 17, 12:00am

    NOW until 12:00am Tue

    Winter Weather Advisory

  • Tonight

    Low: 5 °F

    Scattered
    Snow Showers
    and Areas
    Blowing Snow

  • Tuesday

    Tuesday: Increasing clouds, with a high near 23. Wind chill values as low as -7. West northwest wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 23 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow. Low around 18. South wind 5 to 15 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 18 °F

    Snow

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 39. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 39 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. South southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Scattered snow showers, mainly before 1am. Areas of blowing snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 5. Wind chill values as low as -6. Northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Tuesday
Increasing clouds, with a high near 23. Wind chill values as low as -7. West northwest wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Snow. Low around 18. South wind 5 to 15 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 39. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
Mostly cloudy, with a low around 30. South southwest wind around 5 mph, with gusts as high as 10 mph.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 32.
Friday
Mostly cloudy, with a high near 53.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Partly sunny, with a high near 52.
Sunday Night
Mostly cloudy, with a low around 27.
Monday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
8:16 pm CDT Mar 16, 2026
Forecast Valid:
8pm CDT Mar 16, 2026-6pm CDT Mar 23, 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