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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Smithton IL

  • Today

    Today: Sunny, with a high near 18. Light west wind becoming southwest 8 to 13 km/h in the morning.

    High: 18 °C

    Sunny

  • Tonight

    Tonight: Clear, with a low around 6. South wind around 11 km/h.

    Low: 6 °C

    Clear

  • Monday

    Monday: Sunny, with a high near 24. South wind 10 to 15 km/h increasing to 19 to 24 km/h in the afternoon. Winds could gust as high as 37 km/h.

    High: 24 °C

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 16. South wind 14 to 18 km/h, with gusts as high as 32 km/h.

    Low: 16 °C

    Mostly Clear

  • Tuesday

    Tuesday: Rain likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 26. South wind 13 to 18 km/h increasing to 21 to 26 km/h in the afternoon. Winds could gust as high as 40 km/h. Chance of precipitation is 60%.

    High: 26 °C

    Slight Chance
    Rain then
    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 13. Chance of precipitation is 90%.

    Low: 13 °C

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 1pm, then rain likely. High near 19. Breezy. Chance of precipitation is 100%.

    High: 19 °C

    Rain and
    Breezy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 1am. Partly cloudy, with a low around 0.

    Low: 0 °C

    Slight Chance
    Rain

  • Thursday

    Thursday: Sunny, with a high near 12.

    High: 12 °C

    Sunny

Detailed Forecast

Today
Sunny, with a high near 18. Light west wind becoming southwest 8 to 13 km/h in the morning.
Tonight
Clear, with a low around 6. South wind around 11 km/h.
Monday
Sunny, with a high near 24. South wind 10 to 15 km/h increasing to 19 to 24 km/h in the afternoon. Winds could gust as high as 37 km/h.
Monday Night
Mostly clear, with a low around 16. South wind 14 to 18 km/h, with gusts as high as 32 km/h.
Tuesday
Rain likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 26. South wind 13 to 18 km/h increasing to 21 to 26 km/h in the afternoon. Winds could gust as high as 40 km/h. Chance of precipitation is 60%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 13. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm before 1pm, then rain likely. High near 19. Breezy. Chance of precipitation is 100%.
Wednesday Night
A 20 percent chance of rain before 1am. Partly cloudy, with a low around 0.
Thursday
Sunny, with a high near 12.
Thursday Night
Mostly cloudy, with a low around 6.
Friday
Partly sunny, with a high near 19.
Friday Night
Mostly cloudy, with a low around 3.
Saturday
Partly sunny, with a high near 13.
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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 m)
Last Update:
5:46 am CDT Mar 8, 2026
Forecast Valid:
6am CDT Mar 8, 2026-6pm CDT Mar 14, 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