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Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

73°F

23°C

Humidity 57%
Wind Speed SW 7 mph
Barometer 30.05 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 24 Jul 7:45 pm CDT
Extended Forecast for

South Beloit IL

  • Tonight

    Tonight: Partly cloudy, with a low around 58. South wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 84. South wind 5 to 10 mph.

    High: 84 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny and hot, with a high near 90. Heat index values as high as 99. Southwest wind 5 to 10 mph.

    High: 90 °F

    Hot

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72. Southwest wind 5 to 10 mph.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny and hot, with a high near 91. Southwest wind 5 to 15 mph.

    High: 91 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. North wind 5 to 10 mph.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88. North wind 5 to 10 mph.

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. South wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 84. South wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny and hot, with a high near 90. Heat index values as high as 99. Southwest wind 5 to 10 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 72. Southwest wind 5 to 10 mph.
Monday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny and hot, with a high near 91. Southwest wind 5 to 15 mph.
Monday Night
Partly cloudy, with a low around 68. North wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 88. North wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 88.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.49°N 89.02°W (Elev. 732 ft)
Last Update:
6:41 pm CDT Jul 24, 2026
Forecast Valid:
8pm CDT Jul 24, 2026-6pm CDT Jul 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