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.

Fog/Mist

26°F

-3°C

Humidity 100%
Wind Speed Calm
Barometer 29.96 in (1015.4 mb)
Dewpoint 26°F (-3°C)
Visibility 5.00 mi
Last update 6 Dec 6:54 am CST
Extended Forecast for

Weldon Spring MO

  • Today

    Today: Mostly sunny, with a high near 45. Calm wind becoming east around 6 mph in the afternoon.

    High: 45 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of rain before 2am, then a slight chance of rain after 5am. Mostly cloudy, with a low around 35. Southeast wind 5 to 7 mph becoming south after midnight. Chance of precipitation is 20%.

    Low: 35 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Mostly cloudy, with a temperature falling to around 30 by 5pm. Southwest wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 38 °F⇓

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16. North wind 5 to 9 mph.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32. Light and variable wind.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 45. Calm wind becoming east around 6 mph in the afternoon.
Tonight
A slight chance of rain before 2am, then a slight chance of rain after 5am. Mostly cloudy, with a low around 35. Southeast wind 5 to 7 mph becoming south after midnight. Chance of precipitation is 20%.
Sunday
A 20 percent chance of rain before noon. Mostly cloudy, with a temperature falling to around 30 by 5pm. Southwest wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 16. North wind 5 to 9 mph.
Monday
Mostly sunny, with a high near 32. Light and variable wind.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
A slight chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 28.
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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:
6:16 am CST Dec 6, 2025
Forecast Valid:
7am CST Dec 6, 2025-6pm CST Dec 12, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation