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Lanark, Illinois Weather Forecast
Lanark, Illinois Weather
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Weather Forecast for Lanark, Illinois : Carroll County
Issued: 10:41 pm CST Dec 20, 2025 Latitude: 42.1022465 Longitude: -89.8334527 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Christmas Day Friday Saturday
Clear on Overnight Sunny on Sunday Mostly Cloudy on Monday Partly Sunny on Tuesday 30% chance of rain on Wednesday Mostly Cloudy on Christmas Day Mostly Cloudy on Friday Partly Sunny on Saturday
Low: 10°F High: 28°F High: 39°F High: 43°F High: 44°F High: 52°F High: 44°F High: 41°F
Low: 22 °F Low: 32°F Low: 27°F Low: 38°F Low: 33°F Low: 28°F  
Clear Sunny Mostly Cloudy Partly Sunny Rain Mostly Cloudy Mostly Cloudy Partly Sunny
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Current Conditions at
SAVANNA - (KSFY)
23°
Clear
as of 1:15 AM CST
Rel. Humidity: 57%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.27 in.
Flight Rule: VFR
Wind Data
7 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
ALBERTUS AIRPORT - (KFEP)
21°
Clear
as of 1:15 AM CST
Rel. Humidity: 57%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
8 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
STERLING ROCK - (KSQI)
25°
Clear
as of 12:56 AM CST
Rel. Humidity: 58%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
8 MPH
300° Northwest
Cloud Level(s): Clear
Clear on Overnight Overnight... Clear, with a low around 10. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.
Sunny on Sunday Sunday... Sunny, with a high near 28. Calm wind becoming southwest around 5 mph in the afternoon.
Increasing Clouds on Sunday Night Sunday Night... Increasing clouds, with a temperature falling to near 22 by 10pm, then rising to around 28 during the remainder of the night. South wind 5 to 15 mph.
Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 39. South wind around 10 mph, with gusts as high as 20 mph.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 32.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 43.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 27.
30% chance of rain Wednesday Wednesday... A 30 percent chance of rain after noon. Cloudy, with a high near 44.
Cloudy on Wednesday Night Wednesday Night... Cloudy, with a low around 38.
Mostly Cloudy on Christmas Day Christmas Day... Mostly cloudy, with a high near 52.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 33.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 44.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 28.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 41.
Sun Almanac for Lanark, Illinois
Sunrise: 07:25 AM
Sunset: 4:31 PM
Civil Sunrise:06:53 AM
Civil Sunset: 5:03 PM
Nautical Sunrise: 06:17 AM
Nautical Sunset: 5:38 PM
Astro Sunrise: 05:43 AM
Astro Sunset: 6:12 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.