Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

55°F

13°C

Humidity 67%
Wind Speed NW 9 mph
Barometer 29.77 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 20 Mar 9:45 am CDT
Extended Forecast for

South Beloit IL

  • Today

    Today: Partly sunny, with a high near 63. West wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 63 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. North northeast wind around 5 mph becoming southeast after midnight.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 69. Southeast wind 5 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 69 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers.  Mostly cloudy, with a high near 50. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 50 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

Detailed Forecast

Today
Partly sunny, with a high near 63. West wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly cloudy, with a low around 38. North northeast wind around 5 mph becoming southeast after midnight.
Saturday
Mostly sunny, with a high near 69. Southeast wind 5 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 48. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
A 20 percent chance of showers. Mostly cloudy, with a high near 50. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 29.
Monday
Sunny, with a high near 47.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Mostly cloudy, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 52.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
9:51 am CDT Mar 20, 2026
10am CDT Mar 20, 2026-6pm CDT Mar 26, 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