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

43°F

6°C

Humidity 60%
Wind Speed N 18 G 28 mph
Barometer 30.23 in (1023.4 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 23 Mar 2:53 am CDT
Extended Forecast for

Smithton IL

  • Overnight

    Overnight: Mostly clear, with a low around 35. North wind around 15 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 54. North wind around 11 mph, with gusts as high as 21 mph.

    High: 54 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A chance of sprinkles after 2am. Mostly cloudy, with a low around 36. East wind around 7 mph.

    Low: 36 °F

    Chance
    Sprinkles

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. Southeast wind 6 to 8 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. Southeast wind around 6 mph becoming calm after midnight.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 35. North wind around 15 mph, with gusts as high as 25 mph.
Monday
Increasing clouds, with a high near 54. North wind around 11 mph, with gusts as high as 21 mph.
Monday Night
A chance of sprinkles after 2am. Mostly cloudy, with a low around 36. East wind around 7 mph.
Tuesday
Mostly sunny, with a high near 61. Southeast wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 40. Southeast wind around 6 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 88.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 42. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 52.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 63.
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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:
2:51 am CDT Mar 23, 2026
Forecast Valid:
3am CDT Mar 23, 2026-6pm CDT Mar 29, 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