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

Hazardous Weather Conditions

Current conditions at

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Light Rain

45°F

7°C

Humidity 93%
Wind Speed N 7 mph
Barometer 30.17 in
Dewpoint 43°F (6°C)
Visibility 5.00 mi
Wind Chill41°F (5°C)
Last update 10 Apr 5:35 am CDT
Extended Forecast for

Lanark IL

  • Overnight

    Overnight: A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 46. North wind around 10 mph.

    Low: 46 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 55. North wind around 10 mph, with gusts as high as 20 mph.

    High: 55 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 35. North wind around 5 mph becoming east after midnight.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Increasing clouds, with a high near 58. Southeast wind 5 to 15 mph.

    High: 58 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. Breezy. Chance of precipitation is 70%.

    High: 72 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 60. Breezy.

    Low: 60 °F

    Chance
    Showers and
    Breezy

  • Monday

    Monday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 50 percent chance of showers. Mostly cloudy, with a steady temperature around 46. North wind around 10 mph.
Friday
A 20 percent chance of showers before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 55. North wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 35. North wind around 5 mph becoming east after midnight.
Saturday
A 30 percent chance of showers after 1pm. Increasing clouds, with a high near 58. Southeast wind 5 to 15 mph.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 50.
Sunday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 72. Breezy. Chance of precipitation is 70%.
Sunday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 60. Breezy.
Monday
Partly sunny, with a high near 78.
Monday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 63.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 58. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 71.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 51.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 75.
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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:
5:27 am CDT Apr 10, 2026
Forecast Valid:
5am CDT Apr 10, 2026-6pm CDT Apr 16, 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