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

47°F

8°C

Humidity 61%
Wind Speed NE 3 mph
Barometer 29.91 in (1013.4 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 6 Dec 12:54 pm CST
Extended Forecast for

Weldon Spring MO

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 45. East wind 3 to 6 mph.

    High: 45 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of rain between midnight and 2am. Mostly cloudy, with a low around 33. Southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 20%.

    Low: 33 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: A slight chance of drizzle before noon. Mostly cloudy, with a temperature rising to near 37 by 10am, then falling to around 30 during the remainder of the day. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 22 mph.

    High: 37 °F⇓

    Slight Chance
    Drizzle then
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18. North wind 5 to 10 mph becoming light after midnight.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32. Light and variable wind.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 45. East wind 3 to 6 mph.
Tonight
A slight chance of rain between midnight and 2am. Mostly cloudy, with a low around 33. Southeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 20%.
Sunday
A slight chance of drizzle before noon. Mostly cloudy, with a temperature rising to near 37 by 10am, then falling to around 30 during the remainder of the day. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 18. North wind 5 to 10 mph becoming light after midnight.
Monday
Mostly sunny, with a high near 32. Light and variable wind.
Monday Night
Partly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
A slight chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 28.
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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:
12:36 pm CST Dec 6, 2025
Forecast Valid:
1pm CST Dec 6, 2025-6pm CST Dec 12, 2025
 
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