National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

62°F

17°C

Humidity 75%
Wind Speed SW 3 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 16 Jun 12:53 am CDT
Extended Forecast for

Sappington MO

  • Overnight

    Overnight: Clear, with a low around 58. Light south wind.

    Low: 58 °F

    Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly before 3pm. Increasing clouds, with a high near 81. South wind 5 to 10 mph becoming west in the morning. Winds could gust as high as 22 mph.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. West wind 5 to 9 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 39 mph.

    High: 92 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 4am, then a slight chance of showers. Low around 69. Southwest wind 8 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 80%.

    Low: 69 °F

    T-storms

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 81. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 61. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 58. Light south wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly before 3pm. Increasing clouds, with a high near 81. South wind 5 to 10 mph becoming west in the morning. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 59. West wind 5 to 9 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 39 mph.
Wednesday Night
Showers and thunderstorms before 4am, then a slight chance of showers. Low around 69. Southwest wind 8 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 80%.
Thursday
A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 81. Chance of precipitation is 40%.
Thursday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
Juneteenth
Sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 63.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.
Monday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sappington MO
 38.53°N 90.38°W (Elev. 604 ft)
Last Update:
1:26 am CDT Jun 16, 2026
Forecast Valid:
1am CDT Jun 16, 2026-6pm CDT Jun 22, 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