National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Overcast

64°F

18°C

Humidity 88%
Wind Speed S 16 mph
Barometer 29.84 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 3 Nov 6:45 am CST
Extended Forecast for

South Beloit IL

  • Today

    Today: Showers and thunderstorms likely, then showers after 3pm. High near 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Breezy.
    Chance
    Showers then
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 59. South southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers

  • Wednesday

    Wednesday: Showers likely before 3pm, then a slight chance of showers after 5pm. Mostly cloudy, with a temperature falling to around 57 by 3pm. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F⇓

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 48. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 48 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers. Mostly cloudy, with a high near 55. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 55 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before noon. Partly sunny, with a high near 52.

    High: 52 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, then showers after 3pm. High near 67. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm. Low around 59. South southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely before 3pm, then a slight chance of showers after 5pm. Mostly cloudy, with a temperature falling to around 57 by 3pm. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 48. Southwest wind around 15 mph, with gusts as high as 25 mph.
Thursday
A 40 percent chance of showers. Mostly cloudy, with a high near 55. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 42.
Friday
A 20 percent chance of showers before noon. Partly sunny, with a high near 52.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Partly sunny, with a high near 51.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 34.
Monday
Sunny, with a high near 57.
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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:
5:31 am CST Nov 3, 2026
Forecast Valid:
6am CST Nov 3, 2026-6pm CST Nov 9, 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