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

41°F

5°C

Humidity 67%
Wind Speed NW 8 mph
Barometer 30.15 in (1021.5 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 6 Feb 5:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: Partly cloudy, with a low around 22. Northwest wind 5 to 9 mph becoming light northeast after midnight. Winds could gust as high as 20 mph.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 37. Light and variable wind becoming east around 6 mph in the morning.

    High: 37 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27. South wind 6 to 8 mph.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 54. South wind 3 to 8 mph.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. East wind around 5 mph becoming calm in the evening.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 67.

    High: 67 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 22. Northwest wind 5 to 9 mph becoming light northeast after midnight. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 37. Light and variable wind becoming east around 6 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 27. South wind 6 to 8 mph.
Sunday
Mostly sunny, with a high near 54. South wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 31. East wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 62.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
A 40 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 67.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Wednesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 50.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 31.
Thursday
A 20 percent chance of rain. Mostly cloudy, with a high near 46.
Thursday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Weldon Spring MO
 38.72°N 90.65°W (Elev. 584 ft)
Last Update:
4:56 pm CST Feb 6, 2026
Forecast Valid:
6pm CST Feb 6, 2026-6pm CST Feb 13, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation