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.

Overcast

75°F

24°C

Humidity 71%
Wind Speed SW 8 G 18 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 15 Oct 9:53 pm CDT
Extended Forecast for

4 Miles WSW Smithton IL

  • Tonight

    Tonight: Scattered showers, mainly before midnight. Increasing clouds, with a low around 50. Light and variable wind becoming northwest 12 to 17 mph after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 30%.

    Low: 50 °F

    Scattered
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 56. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 31 mph.

    High: 56 °F

    Partly Sunny
    then Cloudy
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 9 to 15 mph, with gusts as high as 28 mph.

    Low: 38 °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. Calm wind.

    Low: 34 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °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

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers, mainly before midnight. Increasing clouds, with a low around 50. Light and variable wind becoming northwest 12 to 17 mph after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 30%.
Friday
Mostly cloudy, with a high near 56. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 9 to 15 mph, with gusts as high as 28 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. Calm wind.
Sunday
Sunny, with a high near 66.
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 78.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
10:26 pm CDT Oct 15, 2026
Forecast Valid:
10pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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