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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

73°F

23°C

Humidity 51%
Wind Speed SW 15 G 25 mph
Barometer 29.64 in (1003.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 22 Mar 7:54 am CDT
Extended Forecast for

Weldon Spring MO

  • Today

    Today: Increasing clouds, with a high near 91. Southwest wind 8 to 16 mph becoming north in the afternoon. Winds could gust as high as 23 mph.

    High: 91 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 8pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. Breezy, with a north wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    T-storms and
    Breezy then
    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 56. Northeast wind around 9 mph.

    High: 56 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40. East wind around 6 mph.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. Southeast wind 5 to 7 mph.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.

    Low: 61 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 91.

    High: 91 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Increasing clouds, with a high near 91. Southwest wind 8 to 16 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Tonight
A slight chance of showers and thunderstorms between 8pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. Breezy, with a north wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 20%.
Monday
Increasing clouds, with a high near 56. Northeast wind around 9 mph.
Monday Night
Mostly cloudy, with a low around 40. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 66. Southeast wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 47.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 91.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 42.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 53.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 33.
Saturday
Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Weldon Spring MO
 38.72°N 90.65°W (Elev. 584 ft)
Last Update:
8:26 am CDT Mar 22, 2026
Forecast Valid:
8am CDT Mar 22, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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