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

79°F

26°C

Humidity 30%
Wind Speed NW 7 mph
Barometer 30.02 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 24 May 3:45 pm CDT
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Mostly clear, with a low around 55. North northwest wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 84. South southwest wind 5 to 15 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. South southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. South southwest wind around 5 mph, with gusts as high as 15 mph.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60. South southwest wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 55. North northwest wind around 5 mph becoming calm in the evening.
Memorial Day
Sunny, with a high near 84. South southwest wind 5 to 15 mph.
Monday Night
Mostly clear, with a low around 59. South southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 88. South southwest wind around 5 mph, with gusts as high as 15 mph.
Tuesday Night
Partly cloudy, with a low around 60. South southwest wind around 5 mph becoming calm in the evening.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 55.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
1:21 pm CDT May 24, 2026
Forecast Valid:
4pm CDT May 24, 2026-6pm CDT May 31, 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