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

63°F

17°C

Humidity 81%
Wind Speed SW 13 mph
Barometer 29.74 in (1006.7 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 26 Dec 2:54 am CST
Extended Forecast for

Weldon Spring MO

  • Overnight

    Overnight: Mostly clear, with a low around 58. Southwest wind 3 to 8 mph.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 67. Southwest wind 5 to 10 mph becoming northwest in the afternoon.

    High: 67 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45. Light and variable wind.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 67. Southeast wind 5 to 9 mph.

    High: 67 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 59. South wind 6 to 8 mph.

    Low: 59 °F

    Chance Rain

  • Sunday

    Sunday: Rain and possibly a thunderstorm. High near 71. Chance of precipitation is 90%.

    High: 71 °F

    Rain

  • Sunday Night

    Sunday Night: A chance of rain, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 50%.

    Low: 20 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy and
    Blustery

  • Monday

    Monday: Sunny, with a high near 28. Blustery.

    High: 28 °F

    Mostly Sunny
    and Blustery
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 58. Southwest wind 3 to 8 mph.
Friday
Partly sunny, with a high near 67. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night
Mostly cloudy, with a low around 45. Light and variable wind.
Saturday
Mostly cloudy, with a high near 67. Southeast wind 5 to 9 mph.
Saturday Night
A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 59. South wind 6 to 8 mph.
Sunday
Rain and possibly a thunderstorm. High near 71. Chance of precipitation is 90%.
Sunday Night
A chance of rain, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 50%.
Monday
Sunny, with a high near 28. Blustery.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Sunny, with a high near 38.
Tuesday Night
Partly cloudy, with a low around 26.
Wednesday
Mostly sunny, with a high near 40.
Wednesday Night
Partly cloudy, with a low around 22.
New Year's Day
Partly sunny, with a high near 36.
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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:
3:41 am CST Dec 26, 2025
Forecast Valid:
3am CST Dec 26, 2025-6pm CST Jan 1, 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