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

13°F

-11°C

Humidity 61%
Wind Speed W 10 G 22 mph
Barometer 30.27 in (1026.5 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 18 Jan 12:54 am CST
Extended Forecast for

Weldon Spring MO

  • Overnight

    Overnight: Mostly clear, with a low around 11. West wind around 7 mph.

    Low: 11 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of flurries after 10am. Increasing clouds, with a high near 34. Southwest wind 5 to 13 mph, with gusts as high as 24 mph.

    High: 34 °F

    Chance
    Flurries

  • Sunday Night

    Sunday Night: A chance of flurries before 9pm. Mostly cloudy, then gradually becoming clear, with a low around 12. Blustery, with a northwest wind 13 to 21 mph, with gusts as high as 29 mph.

    Low: 12 °F

    Partly Cloudy
    then Mostly
    Clear and
    Blustery

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 21. Northwest wind 6 to 16 mph, with gusts as high as 28 mph.

    High: 21 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 11. Light and variable wind becoming southwest around 6 mph after midnight.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 11. West wind around 7 mph.
Sunday
A chance of flurries after 10am. Increasing clouds, with a high near 34. Southwest wind 5 to 13 mph, with gusts as high as 24 mph.
Sunday Night
A chance of flurries before 9pm. Mostly cloudy, then gradually becoming clear, with a low around 12. Blustery, with a northwest wind 13 to 21 mph, with gusts as high as 29 mph.
M.L.King Day
Mostly sunny, with a high near 21. Northwest wind 6 to 16 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 11. Light and variable wind becoming southwest around 6 mph after midnight.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 29.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 24.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 43.
Friday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 30.
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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:
1:01 am CST Jan 18, 2026
Forecast Valid:
1am CST Jan 18, 2026-6pm CST Jan 24, 2026
 
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Additional Resources

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Chance of Precipitation