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

54°F

12°C

Humidity 91%
Wind Speed SE 6 mph
Barometer 30.30 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 1 Nov 4:15 am CST
Extended Forecast for

Lanark IL

  • Overnight

    Overnight: A 20 percent chance of showers. Cloudy, with a steady temperature around 52. Calm wind.

    Low: 52 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers between 2pm and 4pm. Mostly cloudy, with a high near 63. Southeast wind 5 to 10 mph.

    High: 63 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 51. South wind around 10 mph.

    Low: 51 °F

    Mostly Cloudy

  • Monday

    Monday: Showers likely, mainly after noon. Cloudy, with a high near 67. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 67 °F

    Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: Showers. Low around 60. Breezy. Chance of precipitation is 80%.

    Low: 60 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Showers. High near 71. Breezy. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 71 °F

    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Showers
    Likely then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Cloudy, with a steady temperature around 52. Calm wind.
Sunday
A 20 percent chance of showers between 2pm and 4pm. Mostly cloudy, with a high near 63. Southeast wind 5 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 51. South wind around 10 mph.
Monday
Showers likely, mainly after noon. Cloudy, with a high near 67. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Monday Night
Showers. Low around 60. Breezy. Chance of precipitation is 80%.
Tuesday
Showers. High near 71. Breezy. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Showers. Low around 51. Chance of precipitation is 80%.
Wednesday
Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
A 40 percent chance of showers after noon. Mostly cloudy, with a high near 62.
Thursday Night
Mostly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 59.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 60.
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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:
1:26 am CST Nov 1, 2026
Forecast Valid:
4am CST Nov 1, 2026-6pm CST Nov 7, 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