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

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

53°F

12°C

Humidity 72%
Wind Speed S 5 mph
Barometer 29.88 in (1012.0 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 17 Feb 9:54 am CST
Extended Forecast for

Weldon Spring MO

  • Today

    Today: Mostly cloudy, with a high near 63. South wind 8 to 15 mph, with gusts as high as 26 mph.

    High: 63 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of rain between midnight and 3am. Cloudy during the early evening, then gradual clearing, with a steady temperature around 59. South wind 14 to 18 mph becoming southwest after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Sunny, with a high near 74. West wind 5 to 14 mph, with gusts as high as 23 mph.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. South wind 3 to 6 mph.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 72. South wind 6 to 16 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow. Mostly sunny, with a high near 45.

    High: 45 °F

    Chance Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 63. South wind 8 to 15 mph, with gusts as high as 26 mph.
Tonight
A slight chance of rain between midnight and 3am. Cloudy during the early evening, then gradual clearing, with a steady temperature around 59. South wind 14 to 18 mph becoming southwest after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 74. West wind 5 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Mostly clear, with a low around 48. South wind 3 to 6 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 72. South wind 6 to 16 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.
Thursday Night
Clear, with a low around 36.
Friday
Sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A 30 percent chance of snow. Mostly sunny, with a high near 45.
Saturday Night
A 20 percent chance of snow before midnight. Mostly clear, with a low around 26.
Sunday
Sunny, with a high near 40.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Weldon Spring MO
 38.72°N 90.65°W (Elev. 584 ft)
Last Update:
5:01 am CST Feb 17, 2026
Forecast Valid:
10am CST Feb 17, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation