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.

Partly Cloudy

75°F

24°C

Humidity 50%
Wind Speed W 14 mph
Barometer 29.85 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 13 Oct 1:45 pm CDT
Extended Forecast for

South Beloit IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. West wind 5 to 10 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 1am. Increasing clouds, with a low around 57. Northwest wind around 5 mph becoming calm after midnight.

    Low: 57 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 66. North northeast wind 5 to 10 mph.

    High: 66 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 52. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 52 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 7am. High near 61. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%.

    High: 61 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely before 1am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

  • Friday

    Friday: Mostly sunny, with a high near 56. Breezy.

    High: 56 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Areas of frost after 2am. Otherwise, mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear
    then Areas
    Frost

  • Saturday

    Saturday: Areas of frost before 9am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Areas Frost
    then Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 74. West wind 5 to 10 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 1am. Increasing clouds, with a low around 57. Northwest wind around 5 mph becoming calm after midnight.
Wednesday
Mostly cloudy, with a high near 66. North northeast wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 52. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday
Showers, mainly after 7am. High near 61. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%.
Thursday Night
Showers likely before 1am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 56. Breezy.
Friday Night
Areas of frost after 2am. Otherwise, mostly clear, with a low around 31.
Saturday
Areas of frost before 9am. Otherwise, sunny, with a high near 58.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 64.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Partly sunny, with a high near 66.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
1:31 pm CDT Oct 13, 2026
Forecast Valid:
2pm CDT Oct 13, 2026-6pm CDT Oct 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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