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

34°F

1°C

Humidity 97%
Wind Speed SW 5 mph
Barometer 30.05 in (1018.1 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 8 Mar 4:54 am CDT
Extended Forecast for

Weldon Spring MO

  • Today

    Today: Patchy fog before 8am. Otherwise, sunny, with a high near 66. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Clear, with a low around 46. Southwest wind 6 to 8 mph.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 77. South wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Rain likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 81. South wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 81 °F

    Chance Rain
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 52. Chance of precipitation is 100%.

    Low: 52 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 1pm, then a chance of rain. High near 66. Breezy. Chance of precipitation is 100%.

    High: 66 °F

    Rain and
    Breezy

  • Wednesday Night

    Wednesday Night: A slight chance of rain and snow before 1am. Partly cloudy, with a low around 31. Chance of precipitation is 20%.

    Low: 31 °F

    Slight Chance
    Rain/Snow

  • Thursday

    Thursday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, sunny, with a high near 66. Light southwest wind increasing to 5 to 10 mph in the morning.
Tonight
Clear, with a low around 46. Southwest wind 6 to 8 mph.
Monday
Sunny, with a high near 77. South wind 7 to 13 mph, with gusts as high as 23 mph.
Monday Night
Mostly clear, with a low around 60. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Rain likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 81. South wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 52. Chance of precipitation is 100%.
Wednesday
Rain and possibly a thunderstorm before 1pm, then a chance of rain. High near 66. Breezy. Chance of precipitation is 100%.
Wednesday Night
A slight chance of rain and snow before 1am. Partly cloudy, with a low around 31. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 54.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
Partly sunny, with a high near 66.
Friday Night
Mostly cloudy, with a low around 37.
Saturday
Partly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
Weldon Spring MO
 38.72°N 90.65°W (Elev. 584 ft)
Last Update:
3:21 am CDT Mar 8, 2026
Forecast Valid:
5am CDT Mar 8, 2026-6pm CDT Mar 14, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation