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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Light Rain Fog/Mist

75°F

24°C

Humidity 94%
Wind Speed S 6 mph
Barometer 29.95 in (1013.9 mb)
Dewpoint 73°F (23°C)
Visibility 5.00 mi
Last update 15 Oct 12:53 pm CDT
Extended Forecast for

Smithton IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 82. Southwest wind 9 to 11 mph. Chance of precipitation is 90%.

    High: 82 °F

    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 4am. Increasing clouds, with a low around 48. Southwest wind 8 to 17 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.

    Low: 48 °F

    Showers
    Likely

  • Friday

    Friday: Partly sunny, with a high near 57. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 28 mph.

    High: 57 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 59. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 34.

    Low: 34 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 82. Southwest wind 9 to 11 mph. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 4am. Increasing clouds, with a low around 48. Southwest wind 8 to 17 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Friday
Partly sunny, with a high near 57. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 28 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.
Saturday
Sunny, with a high near 59. North wind 5 to 7 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 34.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 38.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
1:26 pm CDT Oct 15, 2026
Forecast Valid:
1pm CDT Oct 15, 2026-6pm CDT Oct 21, 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