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

21°F

-6°C

Humidity 81%
Wind Speed Calm
Barometer 30.43 in (1031.6 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 11 Jan 10:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: Clear, with a low around 26. Calm wind becoming southwest around 6 mph after midnight.

    Low: 26 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 52. Southwest wind 5 to 10 mph, with gusts as high as 22 mph.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37. Southwest wind 5 to 8 mph.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 59. West wind 9 to 15 mph, with gusts as high as 28 mph.

    High: 59 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 38. West wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature rising to near 41 by 9am, then falling to around 34 during the remainder of the day. Breezy.

    High: 41 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 26. Calm wind becoming southwest around 6 mph after midnight.
Monday
Sunny, with a high near 52. Southwest wind 5 to 10 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 37. Southwest wind 5 to 8 mph.
Tuesday
Increasing clouds, with a high near 59. West wind 9 to 15 mph, with gusts as high as 28 mph.
Tuesday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 38. West wind 8 to 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a temperature rising to near 41 by 9am, then falling to around 34 during the remainder of the day. Breezy.
Wednesday Night
Partly cloudy, with a low around 18.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Mostly cloudy, with a high near 31.
Saturday Night
Partly cloudy, with a low around 15.
Sunday
Mostly sunny, with a high near 33.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Weldon Spring MO
 38.74°N 90.65°W (Elev. 499 ft)
Last Update:
10:36 pm CST Jan 11, 2026
Forecast Valid:
11pm CST Jan 11, 2026-6pm CST Jan 18, 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