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

21°F

-6°C

Humidity 71%
Wind Speed Calm
Barometer 30.09 in (1019.6 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Last update 5 Dec 8:53 am CST
Extended Forecast for

Smithton IL

  • Today

    Today: Sunny, with a high near 41. South wind 5 to 7 mph.

    High: 41 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. South wind 5 to 7 mph becoming west after midnight.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 40. Light and variable wind.

    High: 40 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 30. East wind around 5 mph becoming light and variable.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: A slight chance of rain, mixing with snow after 9am, then gradually ending. Mostly cloudy, with a high near 40. Southeast wind 5 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 40 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 41. South wind 5 to 7 mph.
Tonight
Mostly cloudy, with a low around 28. South wind 5 to 7 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 40. Light and variable wind.
Saturday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 30. East wind around 5 mph becoming light and variable.
Sunday
A slight chance of rain, mixing with snow after 9am, then gradually ending. Mostly cloudy, with a high near 40. Southeast wind 5 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 15.
Monday
Mostly sunny, with a high near 33.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Mostly cloudy, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.41°N 89.99°W (Elev. 453 ft)
Last Update:
6:36 am CST Dec 5, 2025
Forecast Valid:
9am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
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