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 71%
Wind Speed NW 14 mph
Barometer 30.48 in (1033.1 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill2°F (-17°C)
Last update 23 Feb 12:56 am CST
Extended Forecast for

Lanark IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 15. Wind chill values as low as zero. Northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 27. Wind chill values as low as -5. North wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 27 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 16. Light and variable wind becoming south 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Low: 16 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow between noon and 3pm, then a slight chance of rain after 3pm. Partly sunny, with a high near 42. Breezy, with a south wind 15 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    High: 42 °F

    Breezy.
    Partly Sunny
    then Slight
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.

    Low: 18 °F

    Snow Likely

  • Thursday

    Thursday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 17.

    Low: 17 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 15. Wind chill values as low as zero. Northwest wind around 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 27. Wind chill values as low as -5. North wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 16. Light and variable wind becoming south 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Tuesday
A slight chance of snow between noon and 3pm, then a slight chance of rain after 3pm. Partly sunny, with a high near 42. Breezy, with a south wind 15 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 20.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 36.
Thursday Night
Mostly clear, with a low around 17.
Friday
Sunny, with a high near 51.
Friday Night
Partly cloudy, with a low around 28.
Saturday
Partly sunny, with a high near 43.
Saturday Night
Mostly clear, with a low around 18.
Sunday
Mostly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lanark IL
 42.11°N 89.83°W (Elev. 883 ft)
Last Update:
11:02 pm CST Feb 22, 2026
Forecast Valid:
12am CST Feb 23, 2026-6pm CST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation