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

77°F

25°C

Humidity 61%
Wind Speed N 9 mph
Barometer 29.91 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 28 Jul 7:45 pm CDT
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. Calm wind becoming east northeast around 5 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 85. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 63. South southwest wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 70%.

    High: 80 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 64. Chance of precipitation is 70%.

    Low: 64 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 15 mph.
Wednesday
Sunny, with a high near 85. Calm wind becoming east northeast around 5 mph.
Wednesday Night
Mostly clear, with a low around 60. Calm wind.
Thursday
Mostly sunny, with a high near 85. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 63. South southwest wind around 5 mph becoming calm in the evening.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 64. Chance of precipitation is 70%.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 59.
Monday
Mostly sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
3:56 pm CDT Jul 28, 2026
Forecast Valid:
7pm CDT Jul 28, 2026-6pm CDT Aug 4, 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