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

40°F

4°C

Humidity 63%
Wind Speed N 6 mph
Barometer 30.17 in (1021.7 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 10 Feb 11:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Overnight

    Overnight: Mostly clear, with a low around 30. North wind around 7 mph.

    Low: 30 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 50. North wind around 5 mph becoming calm in the afternoon.

    High: 50 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 32. Calm wind.

    Low: 32 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 50. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 50 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 34. Southeast wind 3 to 6 mph.

    Low: 34 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of rain. Cloudy, with a high near 51.

    High: 51 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 30. North wind around 7 mph.
Wednesday
Sunny, with a high near 50. North wind around 5 mph becoming calm in the afternoon.
Wednesday Night
Increasing clouds, with a low around 32. Calm wind.
Thursday
Mostly cloudy, with a high near 50. Calm wind becoming southeast around 6 mph in the afternoon.
Thursday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 34. Southeast wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 54.
Friday Night
Mostly cloudy, with a low around 37.
Saturday
A 40 percent chance of rain. Cloudy, with a high near 51.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 40.
Sunday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 55.
Sunday Night
Mostly clear, with a low around 35.
Washington's Birthday
Sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Partly sunny, with a high near 65.
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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:
10:21 pm CST Feb 10, 2026
Forecast Valid:
12am CST Feb 11, 2026-6pm CST Feb 17, 2026
 
Forecast Discussion
 
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Additional Resources

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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