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

41°F

5°C

Humidity 27%
Wind Speed S 9 mph
Barometer 30.26 in (1025.6 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 20 Jan 2:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: Increasing clouds, with a low around 30. South wind 8 to 11 mph becoming southwest after midnight. Winds could gust as high as 22 mph.

    Low: 30 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 42. West wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 42 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 22. Southwest wind 5 to 8 mph becoming light and variable after midnight.

    Low: 22 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 37. North wind 3 to 5 mph.

    High: 37 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 9. Light north wind increasing to 8 to 13 mph after midnight. Winds could gust as high as 22 mph.

    Low: 9 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 15.

    High: 15 °F

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 2.

    Low: 2 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Cloudy and cold, with a high near 13.

    High: 13 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.

    Low: 7 °F

    Chance Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 30. South wind 8 to 11 mph becoming southwest after midnight. Winds could gust as high as 22 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 42. West wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 22. Southwest wind 5 to 8 mph becoming light and variable after midnight.
Thursday
Partly sunny, with a high near 37. North wind 3 to 5 mph.
Thursday Night
Mostly cloudy, with a low around 9. Light north wind increasing to 8 to 13 mph after midnight. Winds could gust as high as 22 mph.
Friday
Mostly cloudy and cold, with a high near 15.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 2.
Saturday
A 40 percent chance of snow. Cloudy and cold, with a high near 13.
Saturday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.
Sunday
Partly sunny, with a high near 22.
Sunday Night
Partly cloudy, with a low around 5.
Monday
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly sunny, with a high near 37.
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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:
3:15 pm CST Jan 20, 2026
Forecast Valid:
3pm CST Jan 20, 2026-6pm CST Jan 27, 2026
 
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Additional Resources

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Chance of Precipitation