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

67°F

19°C

Humidity 68%
Wind Speed Vrbl 5 mph
Barometer 30.02 in (1016.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 11 Oct 9:56 am CDT
Extended Forecast for

Harmon IL

  • Today

    Today: Sunny, with a high near 81. South wind 5 to 10 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 63. South southeast wind around 5 mph.

    Low: 63 °F

    Increasing
    Clouds

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 88. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 69. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 58. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers. Partly sunny, with a high near 72.

    High: 72 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers after 1am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 68.

    High: 68 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 81. South wind 5 to 10 mph.
Tonight
Increasing clouds, with a low around 63. South southeast wind around 5 mph.
Columbus Day
Mostly sunny, with a high near 88. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 69. South southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 82. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
A slight chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 58. Chance of precipitation is 40%.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 72.
Wednesday Night
A chance of showers after 1am. Mostly cloudy, with a low around 54.
Thursday
Showers likely. Mostly cloudy, with a high near 68.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 48.
Friday
Partly sunny, with a high near 61.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 56.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harmon IL
 41.73°N 89.56°W
Last Update:
10:31 am CDT Oct 11, 2026
Forecast Valid:
10am CDT Oct 11, 2026-6pm CDT Oct 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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