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

57°F

14°C

Humidity 34%
Wind Speed SW 3 mph
Barometer 29.86 in (1011.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 27 Feb 7:53 pm CST
Extended Forecast for

4 Miles WSW Smithton IL

  • Tonight

    Tonight: Mostly clear, with a low around 37. Southwest wind 6 to 8 mph becoming north after midnight.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of rain between 4pm and 5pm. Mostly sunny, with a high near 67. North wind 6 to 9 mph becoming south in the afternoon. Chance of precipitation is 20%.

    High: 67 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 32. South wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 32 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after noon. Increasing clouds, with a high near 47. Northeast wind around 10 mph.

    High: 47 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain and snow. Low around 33. East wind around 9 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow

  • Monday

    Monday: A 40 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly after midnight. Cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 60. Chance of precipitation is 80%.

    High: 60 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain likely and possibly a thunderstorm. Cloudy, with a low around 49. Chance of precipitation is 70%.

    Low: 49 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 37. Southwest wind 6 to 8 mph becoming north after midnight.
Saturday
A slight chance of rain between 4pm and 5pm. Mostly sunny, with a high near 67. North wind 6 to 9 mph becoming south in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 32. South wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Sunday
A 20 percent chance of rain after noon. Increasing clouds, with a high near 47. Northeast wind around 10 mph.
Sunday Night
Rain and snow. Low around 33. East wind around 9 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Monday
A 40 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 45.
Monday Night
Rain likely, mainly after midnight. Cloudy, with a low around 38. Chance of precipitation is 60%.
Tuesday
Rain and possibly a thunderstorm. High near 60. Chance of precipitation is 80%.
Tuesday Night
Rain likely and possibly a thunderstorm. Cloudy, with a low around 49. Chance of precipitation is 70%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 64. Chance of precipitation is 70%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 53.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
7:56 pm CST Feb 27, 2026
Forecast Valid:
8pm CST Feb 27, 2026-6pm CST Mar 6, 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