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

14°F

-10°C

Humidity 58%
Wind Speed W 12 mph
Barometer 30.28 in (1025.8 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 18 Jan 12:53 am CST
Extended Forecast for

Smithton IL

  • Overnight

    Overnight: Mostly clear, with a low around 12. West wind 6 to 9 mph.

    Low: 12 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of flurries after 10am. Increasing clouds, with a high near 33. Southwest wind 5 to 14 mph, with gusts as high as 23 mph.

    High: 33 °F

    Chance
    Flurries

  • Sunday Night

    Sunday Night: A chance of flurries before 9pm. Mostly cloudy, then gradually becoming clear, with a low around 14. Blustery, with a southwest wind 10 to 20 mph becoming northwest after midnight.

    Low: 14 °F

    Partly Cloudy
    then Mostly
    Clear and
    Blustery

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 22. Northwest wind 7 to 16 mph, with gusts as high as 26 mph.

    High: 22 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 10. Northwest wind around 5 mph becoming calm.

    Low: 10 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 12. West wind 6 to 9 mph.
Sunday
A chance of flurries after 10am. Increasing clouds, with a high near 33. Southwest wind 5 to 14 mph, with gusts as high as 23 mph.
Sunday Night
A chance of flurries before 9pm. Mostly cloudy, then gradually becoming clear, with a low around 14. Blustery, with a southwest wind 10 to 20 mph becoming northwest after midnight.
M.L.King Day
Mostly sunny, with a high near 22. Northwest wind 7 to 16 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 10. Northwest wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 28.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 44.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 32.
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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:
1:01 am CST Jan 18, 2026
Forecast Valid:
1am CST Jan 18, 2026-6pm CST Jan 24, 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