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

47°F

8°C

Humidity 36%
Wind Speed W 16 mph
Barometer 30.07 in (1018.7 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 21 Jan 11:54 am CST
Extended Forecast for

Weldon Spring MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 45. West wind 8 to 13 mph, with gusts as high as 23 mph.

    High: 45 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 22. West wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.

    Low: 22 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 38. Calm wind becoming west around 5 mph.

    High: 38 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 7. Light northwest wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 24 mph.

    Low: 7 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 14. North wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 14 °F

    Cold

  • Friday Night

    Friday Night: Cloudy, with a low around 1.

    Low: 1 °F

    Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow. Cloudy and cold, with a high near 12.

    High: 12 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 6.

    Low: 6 °F

    Chance Snow
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.

    High: 20 °F

    Slight Chance
    Snow then
    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 45. West wind 8 to 13 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 22. West wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.
Thursday
Partly sunny, with a high near 38. Calm wind becoming west around 5 mph.
Thursday Night
Mostly cloudy, with a low around 7. Light northwest wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 24 mph.
Friday
Mostly cloudy and cold, with a high near 14. North wind 10 to 15 mph, with gusts as high as 24 mph.
Friday Night
Cloudy, with a low around 1.
Saturday
A 50 percent chance of snow. Cloudy and cold, with a high near 12.
Saturday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 6.
Sunday
A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.
Sunday Night
Partly cloudy, with a low around 3.
Monday
Sunny, with a high near 24.
Monday Night
Mostly clear, with a low around 9.
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:
10:57 am CST Jan 21, 2026
Forecast Valid:
12pm CST Jan 21, 2026-6pm CST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation