National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

75°F

24°C

Humidity 62%
Wind Speed S 9 mph
Barometer 29.95 in (1013.8 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 3 Apr 9:53 pm CDT
Extended Forecast for

4 Miles WSW Smithton IL

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 55. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 55 °F

    Chance
    T-storms then
    T-storms

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 2pm. Temperature falling to around 56 by 1pm. West wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    High: 63 °F⇓

    Showers then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 38. Northwest wind 7 to 13 mph, with gusts as high as 23 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 59. Northwest wind 7 to 11 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39. West wind 3 to 6 mph.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 55. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Saturday
Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 2pm. Temperature falling to around 56 by 1pm. West wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 38. Northwest wind 7 to 13 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 59. Northwest wind 7 to 11 mph.
Sunday Night
Clear, with a low around 39. West wind 3 to 6 mph.
Monday
Sunny, with a high near 63.
Monday Night
Mostly cloudy, with a low around 37.
Tuesday
Partly sunny, with a high near 55.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 74.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Smithton IL
 38.37°N 90.04°W (Elev. 499 ft)
Last Update:
8:06 pm CDT Apr 3, 2026
Forecast Valid:
10pm CDT Apr 3, 2026-6pm CDT Apr 10, 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