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

38°F

3°C

Humidity 62%
Wind Speed SE 6 mph
Barometer 30.15 in (1021.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 2 Feb 4:53 pm CST
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: A 20 percent chance of snow after 5am. Mostly cloudy, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: A chance of drizzle, snow, and freezing rain before 11am, then a slight chance of snow between 11am and noon. Mostly cloudy, with a high near 34. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 34 °F

    Chance Wintry
    Mix then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 18. North wind 3 to 6 mph.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 29. North wind 3 to 6 mph.

    High: 29 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 14. Calm wind.

    Low: 14 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of snow after 5am. Mostly cloudy, with a low around 29. Calm wind.
Tuesday
A chance of drizzle, snow, and freezing rain before 11am, then a slight chance of snow between 11am and noon. Mostly cloudy, with a high near 34. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 18. North wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 29. North wind 3 to 6 mph.
Wednesday Night
Mostly clear, with a low around 14. Calm wind.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 48.
Friday Night
Mostly clear, with a low around 23.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 45.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Mostly sunny, with a high near 48.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
4:46 pm CST Feb 2, 2026
Forecast Valid:
5pm CST Feb 2, 2026-6pm CST Feb 9, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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