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

48°F

9°C

Humidity 80%
Wind Speed Calm
Barometer 29.99 in (1015.7 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 15 Feb 5:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: Mostly clear, with a low around 36. Light and variable wind.

    Low: 36 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 66. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. South wind around 6 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 66. South wind 6 to 15 mph, with gusts as high as 25 mph.

    High: 66 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 56. South wind 14 to 18 mph, with gusts as high as 31 mph.

    Low: 56 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 72. Chance of precipitation is 20%.

    High: 72 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 37.

    Low: 37 °F

    Slight Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 36. Light and variable wind.
Washington's Birthday
Mostly sunny, with a high near 66. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 43. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 66. South wind 6 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 56. South wind 14 to 18 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 72. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 37.
Friday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 51.
Friday Night
A 30 percent chance of rain. Partly cloudy, with a low around 31.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 48.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 27.
Sunday
Sunny, with a high near 46.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Weldon Spring MO
 38.72°N 90.65°W (Elev. 584 ft)
Last Update:
5:01 pm CST Feb 15, 2026
Forecast Valid:
6pm CST Feb 15, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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