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

28°F

-2°C

Humidity 72%
Wind Speed Vrbl 3 mph
Barometer 30.38 in (1029.0 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 27 Nov 8:53 pm CST
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: Mostly clear, with a low around 23. Calm wind becoming northwest around 6 mph.

    Low: 23 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 39. Light and variable wind.

    High: 39 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Snow, mainly after 3am. Low around 30. Calm wind becoming southeast 5 to 9 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 30 °F

    Cloudy then
    Snow

  • Saturday

    Saturday: Snow before noon, then rain and snow. High near 38. Southeast wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    High: 38 °F

    Snow then
    Rain/Snow

  • Saturday Night

    Saturday Night: Rain, mainly before midnight. Low around 26. South wind 10 to 14 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.

    Low: 26 °F

    Rain then
    Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 30.

    High: 30 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 23. Calm wind becoming northwest around 6 mph.
Friday
Increasing clouds, with a high near 39. Light and variable wind.
Friday Night
Snow, mainly after 3am. Low around 30. Calm wind becoming southeast 5 to 9 mph in the evening. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday
Snow before noon, then rain and snow. High near 38. Southeast wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Saturday Night
Rain, mainly before midnight. Low around 26. South wind 10 to 14 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.
Sunday
Mostly cloudy, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Mostly cloudy, with a high near 28.
Monday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 32.
Tuesday Night
Partly cloudy, with a low around 20.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
Mostly cloudy, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.44°N 89.99°W (Elev. 449 ft)
Last Update:
9:31 pm CST Nov 27, 2025
Forecast Valid:
9pm CST Nov 27, 2025-6pm CST Dec 4, 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