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

58°F

14°C

Humidity 29%
Wind Speed NW 14 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 18 Apr 5:54 pm CDT
Extended Forecast for

Weldon Spring MO

  • Tonight

    Tonight: Clear, with a low around 39. Northwest wind 6 to 11 mph becoming light and variable. Winds could gust as high as 22 mph.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67. West wind 6 to 15 mph, with gusts as high as 29 mph.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. Northwest wind 5 to 7 mph becoming light and variable after midnight.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 69. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. Southeast wind around 7 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 39. Northwest wind 6 to 11 mph becoming light and variable. Winds could gust as high as 22 mph.
Sunday
Sunny, with a high near 67. West wind 6 to 15 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 40. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 69. Light and variable wind becoming south 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 51. Southeast wind around 7 mph.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 74. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 48.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 68.
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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:
5:56 pm CDT Apr 18, 2026
Forecast Valid:
6pm CDT Apr 18, 2026-6pm CDT Apr 25, 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