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

61°F

16°C

Humidity 94%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 14 Jul 3:30 am CDT
Extended Forecast for

South Beloit IL

  • Today

    Today: Sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. Calm wind becoming south southwest around 5 mph in the morning. Winds could gust as high as 10 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. South wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Light south wind becoming south southwest 5 to 10 mph in the morning. Chance of precipitation is 50%.

    High: 86 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    T-storms
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78.

    High: 78 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 87. Calm wind becoming south southwest around 5 mph in the morning. Winds could gust as high as 10 mph.
Tuesday Night
Mostly clear, with a low around 68. South wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Light south wind becoming south southwest 5 to 10 mph in the morning. Chance of precipitation is 50%.
Wednesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 78.
Thursday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.
Friday
Partly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 60.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 80.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
3:41 am CDT Jul 14, 2025
Forecast Valid:
4am CDT Jul 14, 2025-6pm CDT Jul 20, 2025
 
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