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

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Fair

74°F

23°C

Humidity 40%
Wind Speed N 8 mph
Barometer 29.84 in (1010.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 20 Mar 4:56 pm CDT
Extended Forecast for

Harmon IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. North wind 5 to 10 mph becoming east southeast after midnight. Winds could gust as high as 15 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 76. East southeast wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 54. South southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 59. Breezy, with a west southwest wind 10 to 20 mph becoming north northeast in the morning. Winds could gust as high as 30 mph.

    High: 59 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 30. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 30 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 41. North wind 5 to 10 mph becoming east southeast after midnight. Winds could gust as high as 15 mph.
Saturday
Sunny, with a high near 76. East southeast wind 5 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 54. South southwest wind around 10 mph, with gusts as high as 15 mph.
Sunday
Mostly cloudy, with a high near 59. Breezy, with a west southwest wind 10 to 20 mph becoming north northeast in the morning. Winds could gust as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 30. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 49.
Monday Night
Mostly cloudy, with a low around 33.
Tuesday
Partly sunny, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 55.
Wednesday Night
Mostly cloudy, with a low around 44.
Thursday
A chance of showers. Mostly cloudy, with a high near 67.
Thursday Night
Mostly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harmon IL
 41.73°N 89.56°W
Last Update:
4:06 pm CDT Mar 20, 2026
Forecast Valid:
5pm CDT Mar 20, 2026-6pm CDT Mar 27, 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