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

A Couple of Fast Moving Storms Affecting Areas Along and East of the Rockies

A couple of storm systems will impact travel conditions through the first half of this weekend. Heavy snow from the mountains of the West will move into the upper Midwest and upper Great Lakes through tonight. Record warmth and Gulf moisture along and east of the Mississippi River will fuel severe thunderstorms, heavy rainfall, fog for the Tennessee Valley and deep South on Friday into Saturday. Read More >

Hazardous Weather Conditions

Current conditions at

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

A Few Clouds

56°F

13°C

Humidity 100%
Wind Speed SE 10 G 21 mph
Barometer 29.37 in (994.5 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 8 Jan 6:56 pm CST
Extended Forecast for

Harmon IL

  • Tonight

    Tonight: A chance of rain and thunderstorms before 11pm, then a chance of showers, mainly between 11pm and 1am. Mostly cloudy, with a low around 40. Breezy, with a south wind around 20 mph becoming west after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 50%.

    Low: 40 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 45. Breezy, with a west northwest wind 15 to 20 mph becoming north 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 45 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Sunny

  • Friday Night

    Friday Night: A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 31. Calm wind becoming northeast around 5 mph. Chance of precipitation is 20%.

    Low: 31 °F

    Partly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Partly sunny, with a high near 35. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 35 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 19. West northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 19 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of rain and thunderstorms before 11pm, then a chance of showers, mainly between 11pm and 1am. Mostly cloudy, with a low around 40. Breezy, with a south wind around 20 mph becoming west after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 50%.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 45. Breezy, with a west northwest wind 15 to 20 mph becoming north 5 to 10 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 31. Calm wind becoming northeast around 5 mph. Chance of precipitation is 20%.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 35. West northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 19. West northwest wind around 15 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 30.
Sunday Night
Partly cloudy, with a low around 22.
Monday
Mostly sunny, with a high near 41.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Mostly cloudy, with a high near 44.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
Partly sunny, with a high near 30.
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:
6:31 pm CST Jan 8, 2026
Forecast Valid:
7pm CST Jan 8, 2026-6pm CST Jan 15, 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