Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

66°F

19°C

Humidity 43%
Wind Speed E 17 G 25 mph
Barometer 30.02 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 22 May 4:45 pm CDT
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. East wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 74. East northeast wind around 5 mph.

    High: 74 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after midnight.  Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm  after midnight.

    Low: 55 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm.  Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 79 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 54. West northwest wind around 5 mph becoming calm.

    Low: 54 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Tuesday Night

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

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. East wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 74. East northeast wind around 5 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm after midnight.
Sunday
A 20 percent chance of showers before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming west northwest around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 54. West northwest wind around 5 mph becoming calm.
Memorial Day
Sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 82.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
2:46 pm CDT May 22, 2026
5pm CDT May 22, 2026-6pm CDT May 29, 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