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

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

25°F

-4°C

Humidity 59%
Wind Speed S 13 G 21 mph
Barometer 30.20 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 1 Feb 11:45 am CST
Extended Forecast for

South Beloit IL

  • This Afternoon

    This Afternoon: A 30 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 25. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 25 °F

    Chance Snow

  • Tonight

    Tonight: Snow likely, mainly before midnight. Cloudy, with a steady temperature around 21. South southwest wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Snow Likely

  • Monday

    Monday: Partly sunny, with a high near 26. West northwest wind 5 to 10 mph.

    High: 26 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 10. West northwest wind around 5 mph becoming calm in the evening.

    Low: 10 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 22. North wind around 5 mph, with gusts as high as 10 mph.

    High: 22 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 3.

    Low: 3 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 25. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Snow likely, mainly before midnight. Cloudy, with a steady temperature around 21. South southwest wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday
Partly sunny, with a high near 26. West northwest wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 10. West northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 22. North wind around 5 mph, with gusts as high as 10 mph.
Tuesday Night
Partly cloudy, with a low around 3.
Wednesday
Sunny, with a high near 23.
Wednesday Night
Mostly cloudy, with a low around 10.
Thursday
Partly sunny, with a high near 34.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 26.
Friday
Mostly cloudy, with a high near 33.
Friday Night
Partly cloudy, with a low around 6.
Saturday
Mostly sunny, with a high near 19.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
11:46 am CST Feb 1, 2026
Forecast Valid:
12pm CST Feb 1, 2026-6pm CST Feb 7, 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