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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

5 Miles SW Smithton IL

  • Overnight

    Overnight: Clear, with a low around 45. South wind around 8 mph.

    Low: 45 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 79. South wind 7 to 15 mph, with gusts as high as 22 mph.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. South wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 81. South wind 6 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    High: 81 °F

    Mostly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 57. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    Low: 57 °F

    Chance
    T-storms then
    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 1pm, then rain likely. Temperature rising to near 64 by 10am, then falling to around 49 during the remainder of the day. Chance of precipitation is 100%.

    High: 64 °F⇓

    Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 45. South wind around 8 mph.
Monday
Sunny, with a high near 79. South wind 7 to 15 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 60. South wind 7 to 11 mph, with gusts as high as 21 mph.
Tuesday
A chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 81. South wind 6 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 57. Southwest wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm before 1pm, then rain likely. Temperature rising to near 64 by 10am, then falling to around 49 during the remainder of the day. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
Sunny, with a high near 53.
Thursday Night
Mostly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 64.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 69.
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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:
1:26 am CDT Mar 9, 2026
Forecast Valid:
1am CDT Mar 9, 2026-6pm CDT Mar 15, 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