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.

A Few Clouds

38°F

3°C

Humidity 89%
Wind Speed Calm
Barometer 30.22 in (1023.5 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 19 Apr 5:53 am CDT
Extended Forecast for

4 Miles WSW Smithton IL

  • Today

    Today: Sunny, with a high near 67. West wind 5 to 15 mph, with gusts as high as 28 mph.

    High: 67 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Northwest wind around 6 mph becoming light and variable after midnight.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 67. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 48. South wind around 7 mph.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 67. West wind 5 to 15 mph, with gusts as high as 28 mph.
Tonight
Partly cloudy, with a low around 40. Northwest wind around 6 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 67. Calm wind becoming southeast 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 48. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 78. Southwest wind 6 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Sunny, with a high near 82.
Thursday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 63.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 76. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 50.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 69.
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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:
5:11 am CDT Apr 19, 2026
Forecast Valid:
6am CDT Apr 19, 2026-6pm CDT Apr 25, 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