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.

Overcast

31°F

-1°C

Humidity 82%
Wind Speed N 18 mph
Barometer 30.28 in (1025.5 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 7 Dec 8:53 pm CST
Extended Forecast for

Smithton IL

  • Tonight

    Tonight: A 20 percent chance of snow before 11pm. Cloudy early, then gradual clearing, with a low around 23. North wind 8 to 15 mph, with gusts as high as 23 mph.

    Low: 23 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 35. North wind 5 to 8 mph becoming calm in the afternoon.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. Light and variable wind becoming south 5 to 10 mph in the evening.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 53. Southwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 53 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41. South wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: A 30 percent chance of snow before noon. Mostly cloudy, with a high near 36.

    High: 36 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of snow before 11pm. Cloudy early, then gradual clearing, with a low around 23. North wind 8 to 15 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 35. North wind 5 to 8 mph becoming calm in the afternoon.
Monday Night
Partly cloudy, with a low around 26. Light and variable wind becoming south 5 to 10 mph in the evening.
Tuesday
Mostly sunny, with a high near 53. Southwest wind 8 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 41. South wind 13 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.
Thursday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 19.
Friday
Partly sunny, with a high near 28.
Friday Night
Partly cloudy, with a low around 7.
Saturday
Mostly sunny, with a high near 21.
Saturday Night
Mostly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithton IL
 38.44°N 89.99°W (Elev. 449 ft)
Last Update:
6:51 pm CST Dec 7, 2025
Forecast Valid:
9pm CST Dec 7, 2025-6pm CST Dec 14, 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