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

33°F

1°C

Humidity 36%
Wind Speed NW 20 G 31 mph
Barometer 30.46 in (1032.4 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 22 Feb 2:54 pm CST
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: Increasing clouds, with a low around 14. Northwest wind around 15 mph, with gusts as high as 29 mph.

    Low: 14 °F

    Increasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 31. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 20. Calm wind becoming south 5 to 8 mph after midnight.

    Low: 20 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 56. South wind 9 to 15 mph, with gusts as high as 25 mph.

    High: 56 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. Southwest wind 5 to 10 mph becoming light west after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.

    Low: 35 °F

    Rain Likely

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Mostly sunny, with a high near 52.

    High: 52 °F

    Chance Rain
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 14. Northwest wind around 15 mph, with gusts as high as 29 mph.
Monday
Sunny, with a high near 31. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.
Monday Night
Increasing clouds, with a low around 20. Calm wind becoming south 5 to 8 mph after midnight.
Tuesday
Mostly cloudy, with a high near 56. South wind 9 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 34. Southwest wind 5 to 10 mph becoming light west after midnight.
Wednesday
Mostly sunny, with a high near 55.
Wednesday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 30.
Friday
Sunny, with a high near 66.
Friday Night
Mostly clear, with a low around 39.
Saturday
Sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
A slight chance of rain and snow. Partly sunny, with a high near 50. Chance of precipitation is 20%.
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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:
3:11 pm CST Feb 22, 2026
Forecast Valid:
3pm CST Feb 22, 2026-6pm CST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation