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 92%
Wind Speed Calm
Barometer 30.38 in
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Last update 31 Jan 11:55 pm CST
Extended Forecast for

South Beloit IL

  • Overnight

    Overnight: Mostly clear, with a low around 5. Wind chill values as low as -3. Calm wind becoming southwest around 5 mph.

    Low: 5 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of snow, mainly after 3pm. Partly sunny, with a high near 26. Wind chill values as low as -4. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 26 °F

    Partly Sunny
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly before midnight. Cloudy, with a low around 17. South 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: 17 °F

    Snow Likely
    then Slight
    Chance Snow

  • 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 9. Northwest wind around 5 mph becoming calm in the evening.

    Low: 9 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 4.

    Low: 4 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 5. Wind chill values as low as -3. Calm wind becoming southwest around 5 mph.
Sunday
A 30 percent chance of snow, mainly after 3pm. Partly sunny, with a high near 26. Wind chill values as low as -4. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Snow likely, mainly before midnight. Cloudy, with a low around 17. South 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 9. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 21.
Tuesday Night
Partly cloudy, with a low around 4.
Wednesday
Sunny, with a high near 23.
Wednesday Night
Partly cloudy, with a low around 9.
Thursday
A chance of snow after noon. Mostly cloudy, with a high near 32.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 25.
Friday
Mostly cloudy, with a high near 33.
Friday Night
Mostly cloudy, with a low around 8.
Saturday
Partly sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
11:41 pm CST Jan 31, 2026
Forecast Valid:
12am CST Feb 1, 2026-6pm CST Feb 7, 2026
 
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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