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

Hazardous Weather Conditions

Current conditions at

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Fair

16°F

-9°C

Humidity 62%
Wind Speed W 3 mph
Barometer 30.22 in (1024.4 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 17 Mar 10:56 am CDT
Extended Forecast for

Harmon IL

  • Today

    Today: Partly sunny, with a high near 22. West northwest wind 5 to 10 mph becoming southwest in the afternoon.

    High: 22 °F

    Partly Sunny

  • Tonight

    Tonight: Snow, mainly after 10pm. Temperature rising to around 25 by 5am. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 22 °F⇑

    Snow

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 39. South southeast wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 39 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 34. South wind around 5 mph.

    Low: 34 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 49. South wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 22. West northwest wind 5 to 10 mph becoming southwest in the afternoon.
Tonight
Snow, mainly after 10pm. Temperature rising to around 25 by 5am. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 39. South southeast wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.
Wednesday Night
Mostly cloudy, with a low around 34. South wind around 5 mph.
Thursday
Mostly sunny, with a high near 49. South wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Partly sunny, with a high near 62.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Partly sunny, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 30.
Monday
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:
11:01 am CDT Mar 17, 2026
Forecast Valid:
11am CDT Mar 17, 2026-6pm CDT Mar 23, 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