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

37°F

3°C

Humidity 70%
Wind Speed Calm
Barometer 30.11 in (1020.0 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 19 Apr 12:56 am CDT
Extended Forecast for

6 Miles SSE Harmon IL

Freeze Watch April 20, 12:00am until April 20, 09:00am
Frost Advisory until April 19, 09:00am
Click here for hazard details and duration
Freeze Watch
Frost Advisory
  •  
    Frost Advisory until April 19, 09:00am

    NOW until 9:00am Sun

    Frost Advisory

  • Overnight

    Low: 33 °F

    Areas Frost

  • Sunday

    Sunday: A slight chance of showers between 11am and 4pm. Increasing clouds, with a high near 51. West northwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 51 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Widespread frost after 1am. Otherwise, mostly clear, with a low around 29. Northwest wind 10 to 15 mph becoming light and variable after midnight.

    Low: 29 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost before 8am. Otherwise, sunny, with a high near 55. Calm wind becoming south around 5 mph in the morning. Winds could gust as high as 15 mph.

    High: 55 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Overnight
Areas of frost. Otherwise, clear, with a low around 33. West southwest wind around 5 mph.
Sunday
A slight chance of showers between 11am and 4pm. Increasing clouds, with a high near 51. West northwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Sunday Night
Widespread frost after 1am. Otherwise, mostly clear, with a low around 29. Northwest wind 10 to 15 mph becoming light and variable after midnight.
Monday
Widespread frost before 8am. Otherwise, sunny, with a high near 55. Calm wind becoming south around 5 mph in the morning. Winds could gust as high as 15 mph.
Monday Night
Partly cloudy, with a low around 45. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Showers likely. Mostly cloudy, with a low around 60.
Friday
Showers likely. Mostly cloudy, with a high near 70.
Friday Night
A chance of showers. Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSE Harmon IL
 41.64°N 89.51°W
Last Update:
1:21 am CDT Apr 19, 2026
Forecast Valid:
1am CDT Apr 19, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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