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

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Overcast

51°F

11°C

Humidity 92%
Wind Speed SW 9 G 17 mph
Barometer 29.68 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 4 Nov 4:35 pm CST
Extended Forecast for

Lanark IL

  • This Afternoon

    This Afternoon: A slight chance of drizzle. Cloudy, with a steady temperature around 55. Southwest wind around 15 mph, with gusts as high as 20 mph.

    High: 55 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: A slight chance of drizzle before 10pm, then a slight chance of showers after 10pm. Cloudy, with a low around 46. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 46 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers, mainly before 5pm. Cloudy, with a high near 50. Southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 50 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 35. North wind around 10 mph.

    Low: 35 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of drizzle. Cloudy, with a steady temperature around 55. Southwest wind around 15 mph, with gusts as high as 20 mph.
Tonight
A slight chance of drizzle before 10pm, then a slight chance of showers after 10pm. Cloudy, with a low around 46. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Thursday
A 40 percent chance of showers, mainly before 5pm. Cloudy, with a high near 50. Southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
A 20 percent chance of showers before 8pm. Cloudy, then gradually becoming partly cloudy, with a low around 35. North wind around 10 mph.
Friday
Mostly sunny, with a high near 48.
Friday Night
Mostly clear, with a low around 27.
Saturday
Sunny, with a high near 51.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Sunny, with a high near 58.
Sunday Night
Clear, with a low around 33.
Monday
Sunny, with a high near 61.
Monday Night
Clear, with a low around 37.
Tuesday
Sunny, with a high near 61.
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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:
1:36 pm CST Nov 4, 2026
Forecast Valid:
4pm CST Nov 4, 2026-6pm CST Nov 10, 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