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

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Overcast

29°F

-2°C

Humidity 49%
Wind Speed W 5 mph
Barometer 30.07 in (1018.8 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 3 Jan 1:56 pm CST
Extended Forecast for

Lanark IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 27. West wind around 5 mph.

    High: 27 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 16. Northwest wind around 5 mph becoming calm in the evening.

    Low: 16 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Increasing clouds, with a high near 31. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 31 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 27. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Gradual
    Clearing

  • Monday

    Monday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 27. West wind around 5 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 16. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Increasing clouds, with a high near 31. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 27. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 43.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Mostly sunny, with a high near 47.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 50.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 36.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 46.
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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:
1:51 pm CST Jan 3, 2026
Forecast Valid:
2pm CST Jan 3, 2026-6pm CST Jan 9, 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