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.

Fair

61°F

16°C

Humidity 54%
Wind Speed S 7 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 14 May 11:53 pm CDT
Extended Forecast for

4 Miles WSW Smithton IL

  • Overnight

    Overnight: Partly cloudy, with a low around 54. South wind 5 to 9 mph.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 84. South wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 84 °F

    Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 66. South wind around 9 mph.

    Low: 66 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 84. South wind 8 to 10 mph. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 64. South wind 7 to 9 mph.

    Low: 64 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 54. South wind 5 to 9 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 84. South wind 10 to 14 mph, with gusts as high as 22 mph.
Friday Night
Mostly cloudy, with a low around 66. South wind around 9 mph.
Saturday
A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 84. South wind 8 to 10 mph. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 64. South wind 7 to 9 mph.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 69.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
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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:
10:21 pm CDT May 14, 2026
Forecast Valid:
12am CDT May 15, 2026-6pm CDT May 21, 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