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

60°F

16°C

Humidity 93%
Wind Speed Calm
Barometer 29.98 in (1014.5 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 12 Oct 7:54 am CDT
Extended Forecast for

Weldon Spring MO

  • Columbus Day

    Columbus Day: Sunny, with a high near 92. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 70. Southwest wind 6 to 8 mph.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Heat index values as high as 100. Southwest wind 6 to 9 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 71. South wind 3 to 6 mph. Chance of precipitation is 60%.

    Low: 71 °F

    Partly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 80. Light and variable wind becoming southwest around 5 mph. Chance of precipitation is 100%.

    High: 80 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.

    High: 79 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 62. Breezy.

    High: 62 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

Detailed Forecast

Columbus Day
Sunny, with a high near 92. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 70. Southwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 94. Heat index values as high as 100. Southwest wind 6 to 9 mph.
Tuesday Night
Showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 71. South wind 3 to 6 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 80. Light and variable wind becoming southwest around 5 mph. Chance of precipitation is 100%.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 62. Breezy.
Friday Night
Mostly clear, with a low around 39.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 70.
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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:
6:21 am CDT Oct 12, 2026
Forecast Valid:
8am CDT Oct 12, 2026-6pm CDT Oct 18, 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