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.

Mostly Cloudy

34°F

1°C

Humidity 31%
Wind Speed S 10 G 21 mph
Barometer 30.35 in (1028.4 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 20 Jan 12:53 pm CST
Extended Forecast for

4 Miles WSW Smithton IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 36. South wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 36 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 26. South wind around 11 mph, with gusts as high as 22 mph.

    Low: 26 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 47. West wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 47 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 23. West wind 5 to 7 mph becoming northwest after midnight.

    Low: 23 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 38. Northwest wind 3 to 6 mph.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 19.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 3.

    Low: 3 °F

    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Mostly cloudy and cold, with a high near 15.

    High: 15 °F

    Chance Snow

Detailed Forecast

This Afternoon
Sunny, with a high near 36. South wind 10 to 14 mph, with gusts as high as 21 mph.
Tonight
Increasing clouds, with a low around 26. South wind around 11 mph, with gusts as high as 22 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 47. West wind 6 to 10 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 23. West wind 5 to 7 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 38. Northwest wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
Mostly cloudy and cold, with a high near 19.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 3.
Saturday
A 40 percent chance of snow. Mostly cloudy and cold, with a high near 15.
Saturday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 6.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Mostly clear, with a low around 7.
Monday
Sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
10:51 am CST Jan 20, 2026
Forecast Valid:
1pm CST Jan 20, 2026-6pm CST Jan 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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