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

33°F

1°C

Humidity 89%
Wind Speed Calm
Barometer 29.94 in (1014.4 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 9 Feb 11:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: Clear, with a temperature rising to around 50 by 5am. Southeast wind 5 to 8 mph becoming southwest after midnight.

    Low: 34 °F⇑

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 62. Southwest wind 6 to 10 mph becoming north in the afternoon.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30. North wind 5 to 7 mph.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 50. North wind 3 to 5 mph.

    High: 50 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Rain

  • Friday

    Friday: Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Tonight
Clear, with a temperature rising to around 50 by 5am. Southeast wind 5 to 8 mph becoming southwest after midnight.
Tuesday
Sunny, with a high near 62. Southwest wind 6 to 10 mph becoming north in the afternoon.
Tuesday Night
Partly cloudy, with a low around 30. North wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 50. North wind 3 to 5 mph.
Wednesday Night
Mostly cloudy, with a low around 32. Calm wind.
Thursday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 47.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 33.
Friday
Mostly cloudy, with a high near 47.
Friday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.
Saturday
Rain likely. Cloudy, with a high near 47. Chance of precipitation is 70%.
Saturday Night
Rain. Low around 36. Chance of precipitation is 80%.
Sunday
A 40 percent chance of rain. Mostly sunny, with a high near 51.
Sunday Night
Mostly clear, with a low around 34.
Washington's Birthday
Mostly sunny, with a high near 58.
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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:
10:31 pm CST Feb 9, 2026
Forecast Valid:
11pm CST Feb 9, 2026-6pm CST Feb 16, 2026
 
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