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.

A Few Clouds

50°F

10°C

Humidity 44%
Wind Speed W 18 G 24 mph
Barometer 30.15 in (1021.3 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 19 Apr 11:56 am CDT
Extended Forecast for

6 Miles SSE Harmon IL

Freeze Warning April 20, 12:00am until April 20, 09:00am
Click here for hazard details and duration
Freeze Warning

  • This Afternoon

    This Afternoon: A 20 percent chance of showers before 4pm. Partly sunny, with a steady temperature around 48. West northwest wind around 15 mph, with gusts as high as 30 mph.

    High: 48 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: 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. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    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

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers before 4pm. Partly sunny, with a steady temperature around 48. West northwest wind around 15 mph, with gusts as high as 30 mph.
Tonight
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. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
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, mainly after 1am. 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:
10:31 am CDT Apr 19, 2026
Forecast Valid:
12pm CDT Apr 19, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation