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.

Fair

39°F

4°C

Humidity 67%
Wind Speed N 12 mph
Barometer 30.36 in (1028.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 23 Mar 7:53 am CDT
Extended Forecast for

4 Miles WSW Smithton IL

  • Today

    Today: Mostly sunny, with a high near 54. North wind around 11 mph, with gusts as high as 21 mph.

    High: 54 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of sprinkles after 2am. Mostly cloudy, with a low around 36. East wind around 7 mph.

    Low: 36 °F

    Chance
    Sprinkles

  • Tuesday

    Tuesday: Partly sunny, with a high near 61. Southeast wind 6 to 8 mph.

    High: 61 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39. Southeast wind around 6 mph becoming calm after midnight.

    Low: 39 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. Calm wind becoming south 5 to 9 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 52.

    High: 52 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 54. North wind around 11 mph, with gusts as high as 21 mph.
Tonight
A chance of sprinkles after 2am. Mostly cloudy, with a low around 36. East wind around 7 mph.
Tuesday
Partly sunny, with a high near 61. Southeast wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 39. Southeast wind around 6 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 74. Calm wind becoming south 5 to 9 mph in the morning.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 88.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 42. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 52.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 64.
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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:
7:26 am CDT Mar 23, 2026
Forecast Valid:
8am CDT Mar 23, 2026-6pm CDT Mar 29, 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