National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

40°F

4°C

Humidity 77%
Wind Speed Calm
Barometer 30.07 in (1018.3 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 25 Mar 6:54 am CDT
Extended Forecast for

Weldon Spring MO

  • Today

    Today: Mostly sunny, with a high near 79. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. South wind 8 to 11 mph, with gusts as high as 22 mph.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Southwest wind 10 to 14 mph, with gusts as high as 28 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm, mainly before 4am, then rain after 4am. Low around 43. Southwest wind 8 to 17 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Showers

  • Friday

    Friday: Rain, mainly before 7am. High near 53. North wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    High: 53 °F

    Rain then
    Chance Rain

  • Friday Night

    Friday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Saturday Night

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

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 79. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Tonight
Mostly clear, with a low around 64. South wind 8 to 11 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 91. Southwest wind 10 to 14 mph, with gusts as high as 28 mph.
Thursday Night
Showers and possibly a thunderstorm, mainly before 4am, then rain after 4am. Low around 43. Southwest wind 8 to 17 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.
Friday
Rain, mainly before 7am. High near 53. North wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Friday Night
Mostly clear, with a low around 32.
Saturday
Sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Partly sunny, with a high near 66.
Sunday Night
Mostly cloudy, with a low around 54.
Monday
A 20 percent chance of rain and thunderstorms. Mostly sunny, with a high near 83.
Monday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 61.
Tuesday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 82.
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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:
3:51 am CDT Mar 25, 2026
Forecast Valid:
7am CDT Mar 25, 2026-6pm CDT Mar 31, 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