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

40°F

4°C

Humidity 65%
Wind Speed NW 12 mph
Barometer 30.28 in (1025.3 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 11 Mar 10:53 pm CDT
Extended Forecast for

5 Miles SW Smithton IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 30. Northwest wind 6 to 14 mph, with gusts as high as 23 mph.

    Low: 30 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 54. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. South wind 10 to 18 mph, with gusts as high as 29 mph.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 61. West wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 61 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. Northwest wind around 6 mph becoming northeast after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain after 1pm. High near 66. Breezy. Chance of precipitation is 80%.

    High: 66 °F

    Breezy.
    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around 25. Blustery. Chance of precipitation is 30%.

    Low: 25 °F

    Chance
    Rain/Snow and
    Blustery

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 30. Northwest wind 6 to 14 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 54. Calm wind becoming southwest 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 43. South wind 10 to 18 mph, with gusts as high as 29 mph.
Friday
Mostly sunny, with a high near 61. West wind 10 to 14 mph, with gusts as high as 23 mph.
Friday Night
Mostly cloudy, with a low around 35. Northwest wind around 6 mph becoming northeast after midnight.
Saturday
Partly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
A chance of rain and thunderstorms, then rain after 1pm. High near 66. Breezy. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around 25. Blustery. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 36. Breezy.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Partly sunny, with a high near 42.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
10:31 pm CDT Mar 11, 2026
Forecast Valid:
11pm CDT Mar 11, 2026-6pm CDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation