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.

A Few Clouds

56°F

13°C

Humidity 93%
Wind Speed SE 5 mph
Barometer 30.02 in (1016.5 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 5 Mar 9:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: A slight chance of rain and thunderstorms before 4am, then a slight chance of rain and thunderstorms after 5am. Patchy fog between 3am and 4am. Otherwise, mostly cloudy, with a low around 56. Calm wind becoming south 5 to 7 mph after midnight. Chance of precipitation is 20%.

    Low: 56 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms and
    Patchy Fog

  • Friday

    Friday: A slight chance of rain and thunderstorms before noon, then a slight chance of rain between noon and 1pm. Partly sunny, with a high near 78. South wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    T-storms then
    Slight Chance
    Rain

  • Friday Night

    Friday Night: Rain and thunderstorms before 3am, then rain likely and possibly a thunderstorm between 3am and 5am, then a chance of rain and thunderstorms after 5am. Low around 60. South wind 10 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    Low: 60 °F

    Slight Chance
    T-storms then
    Rain

  • Saturday

    Saturday: A chance of rain and thunderstorms before 9am, then a chance of rain between 9am and noon. Partly sunny, with a temperature rising to near 64 by 9am, then falling to around 56 during the remainder of the day. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 40%.

    High: 64 °F⇓

    Chance Rain
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. Northwest wind 5 to 9 mph becoming calm in the evening.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 50.

    Low: 50 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: A slight chance of rain, then a chance of rain and thunderstorms after midnight. Partly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Chance Rain

Detailed Forecast

Tonight
A slight chance of rain and thunderstorms before 4am, then a slight chance of rain and thunderstorms after 5am. Patchy fog between 3am and 4am. Otherwise, mostly cloudy, with a low around 56. Calm wind becoming south 5 to 7 mph after midnight. Chance of precipitation is 20%.
Friday
A slight chance of rain and thunderstorms before noon, then a slight chance of rain between noon and 1pm. Partly sunny, with a high near 78. South wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Friday Night
Rain and thunderstorms before 3am, then rain likely and possibly a thunderstorm between 3am and 5am, then a chance of rain and thunderstorms after 5am. Low around 60. South wind 10 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Saturday
A chance of rain and thunderstorms before 9am, then a chance of rain between 9am and noon. Partly sunny, with a temperature rising to near 64 by 9am, then falling to around 56 during the remainder of the day. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 39. Northwest wind 5 to 9 mph becoming calm in the evening.
Sunday
Sunny, with a high near 67.
Sunday Night
Clear, with a low around 50.
Monday
Sunny, with a high near 78.
Monday Night
A slight chance of rain, then a chance of rain and thunderstorms after midnight. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Tuesday
Rain and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 53. Chance of precipitation is 90%.
Wednesday
Rain likely. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 35.
Thursday
Sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Weldon Spring MO
 38.72°N 90.65°W (Elev. 584 ft)
Last Update:
9:31 pm CST Mar 5, 2026
Forecast Valid:
10pm CST Mar 5, 2026-6pm CDT Mar 12, 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