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

63°F

17°C

Humidity 93%
Wind Speed E 3 mph
Barometer 29.91 in (1012.2 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 17 Apr 1:54 am CDT
Extended Forecast for

Weldon Spring MO

  • Overnight

    Overnight: Partly cloudy, with a low around 60. South wind around 5 mph.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 85. South wind 6 to 15 mph, with gusts as high as 26 mph.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 46. South wind 10 to 14 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%.

    Low: 46 °F

    Heavy Rain

  • Saturday

    Saturday: A 40 percent chance of showers before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 58. Northwest wind around 15 mph, with gusts as high as 26 mph.

    High: 58 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38. West wind 5 to 11 mph, with gusts as high as 21 mph.

    Low: 38 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 60. South wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 85. South wind 6 to 15 mph, with gusts as high as 26 mph.
Friday Night
Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 46. South wind 10 to 14 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 100%.
Saturday
A 40 percent chance of showers before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 58. Northwest wind around 15 mph, with gusts as high as 26 mph.
Saturday Night
Mostly clear, with a low around 38. West wind 5 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
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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:
1:26 am CDT Apr 17, 2026
Forecast Valid:
2am CDT Apr 17, 2026-6pm CDT Apr 23, 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