Storms and Heavy Rainfall in the Plains and Southern Appalachians; Hazardous Heat in the South and Southeast

Severe thunderstorms with heavy rainfall will be possible across the southern Appalachians through this evening. Thunderstorms are also expected from the northern/central Plains into portions of the Midwest through Tuesday, and severe storms may produce large hail and damaging wind gusts. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Fair

78°F

26°C

Humidity 62%
Wind Speed W 5 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Aug 6:56 pm CDT
Extended Forecast for

Rock Falls IL

  • Tonight

    Tonight: Mostly clear, with a low around 60. Northwest wind around 5 mph becoming calm.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers between noon and 1pm, then a chance of showers and thunderstorms after 1pm.  Increasing clouds, with a high near 78. Southwest wind 5 to 10 mph.  Chance of precipitation is 50%.

    High: 78 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly before 2am.  Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 63 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78. Calm wind becoming north around 5 mph.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers.  Partly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 60. Northwest wind around 5 mph becoming calm.
Tuesday
A slight chance of showers between noon and 1pm, then a chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 78. Southwest wind 5 to 10 mph. Chance of precipitation is 50%.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 78. Calm wind becoming north around 5 mph.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 59.
Friday
Mostly sunny, with a high near 79.
Friday Night
A 40 percent chance of showers. Partly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Rock Falls IL
 41.77°N 89.7°W (Elev. 643 ft)
6:11 pm CDT Aug 17, 2026
7pm CDT Aug 17, 2026-6pm CDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database