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 27%
Wind Speed NW 14 mph
Barometer 30.41 in (1030.4 mb)
Dewpoint -8°F (-22°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 19 Jan 3:53 pm CST
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: Mostly clear, with a low around 12. Northwest wind around 5 mph becoming light and variable in the evening.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 38. Light south wind increasing to 6 to 11 mph in the morning.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 29. South wind 10 to 14 mph, with gusts as high as 26 mph.

    Low: 29 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 46. West wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 46 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 24. West wind 5 to 7 mph becoming northwest after midnight.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 19.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 2.

    Low: 2 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 12. Northwest wind around 5 mph becoming light and variable in the evening.
Tuesday
Sunny, with a high near 38. Light south wind increasing to 6 to 11 mph in the morning.
Tuesday Night
Increasing clouds, with a low around 29. South wind 10 to 14 mph, with gusts as high as 26 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 46. West wind 6 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 24. West wind 5 to 7 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
Mostly cloudy and cold, with a high near 19.
Friday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 2.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly cloudy and cold, with a high near 13.
Saturday Night
A 30 percent chance of snow. Partly cloudy, with a low around 5.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Mostly clear, with a low around 9.
Monday
Sunny, with a high near 34.
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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 ft)
Last Update:
3:16 pm CST Jan 19, 2026
Forecast Valid:
4pm CST Jan 19, 2026-6pm CST Jan 26, 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