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

23°F

-5°C

Humidity 72%
Wind Speed Vrbl 6 mph
Barometer 30.14 in (1021.8 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 1 Feb 6:56 pm CST
Extended Forecast for

Lanark IL

  • Tonight

    Tonight: Snow likely, mainly before midnight. Mostly cloudy, with a low around 16. Southwest wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 16 °F

    Snow Likely
    then Slight
    Chance Snow

  • Monday

    Monday: Mostly sunny, with a high near 26. Northwest wind 5 to 10 mph.

    High: 26 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 14. North wind around 5 mph.

    Low: 14 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 25. North wind around 5 mph.

    High: 25 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 7.

    Low: 7 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 26.

    High: 26 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow likely, mainly before midnight. Mostly cloudy, with a low around 16. Southwest wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Monday
Mostly sunny, with a high near 26. Northwest wind 5 to 10 mph.
Monday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 14. North wind around 5 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 25. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 7.
Wednesday
Sunny, with a high near 26.
Wednesday Night
Partly cloudy, with a low around 13.
Thursday
Partly sunny, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 35.
Friday Night
Partly cloudy, with a low around 12.
Saturday
Mostly sunny, with a high near 28.
Saturday Night
Mostly cloudy, with a low around 18.
Sunday
Mostly sunny, with a high near 33.
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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:
3:16 pm CST Feb 1, 2026
Forecast Valid:
7pm CST Feb 1, 2026-6pm CST Feb 8, 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