Showers and Thunderstorms from the Southern Plains into the Ohio Valley; Record Warmth in the Central U.S.

Heavy rain and widely scattered severe storms are expected over portions of the central and southern Plains into the Ohio Valley. Unseasonable warmth will continue for a few more days across the Midwest, Southeast, and Mid-Atlantic where several daily record highs could fall. Read More >

Hazardous Weather Conditions

Current conditions at

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Fair

60°F

16°C

Humidity 78%
Wind Speed NE 10 mph
Barometer 30.08 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 14 Oct 9:35 am CDT
Extended Forecast for

Lanark IL

  • Today

    Today: Mostly cloudy, with a high near 65. Northeast wind 5 to 10 mph.

    High: 65 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of showers before 4am, then a slight chance of showers after 5am.  Mostly cloudy, with a low around 52. East wind 5 to 10 mph.  Chance of precipitation is 20%.

    Low: 52 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers, mainly after 9am.  High near 60. East wind 5 to 10 mph.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely before 1am.  Mostly cloudy, with a low around 43. Breezy, with a northwest wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph.  Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 54. Breezy.

    High: 54 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 4am.  Otherwise, mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear
    then Frost

  • Saturday

    Saturday: Widespread frost, mainly before 8am.  Otherwise, sunny, with a high near 56.

    High: 56 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 65. Northeast wind 5 to 10 mph.
Tonight
A slight chance of showers before 4am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 52. East wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday
Showers, mainly after 9am. High near 60. East wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers likely before 1am. Mostly cloudy, with a low around 43. Breezy, with a northwest wind 5 to 10 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 54. Breezy.
Friday Night
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32.
Saturday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 56.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Lanark IL
 42.11°N 89.83°W (Elev. 883 ft)
8:21 am CDT Oct 14, 2026
9am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database