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

72°F

22°C

Humidity 87%
Wind Speed W 10 mph
Barometer 29.69 in (1004.5 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Jun 4:54 am CDT
Extended Forecast for

Chesterfield MO

  • Today

    Today: A 20 percent chance of showers after noon. Increasing clouds, with a high near 78. Northwest wind 3 to 8 mph.

    High: 78 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 59. Northwest wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Partly Cloudy
    then Patchy
    Fog

  • Juneteenth

    Juneteenth: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 85. Calm wind.

    High: 85 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Light south wind.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 90%.

    High: 84 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 62. Chance of precipitation is 80%.

    Low: 62 °F

    Showers

  • Monday

    Monday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

Detailed Forecast

Today
A 20 percent chance of showers after noon. Increasing clouds, with a high near 78. Northwest wind 3 to 8 mph.
Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 59. Northwest wind around 5 mph becoming calm in the evening.
Juneteenth
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 85. Calm wind.
Friday Night
Mostly cloudy, with a low around 65. Calm wind.
Saturday
Mostly sunny, with a high near 86. Light south wind.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.
Sunday
Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 62. Chance of precipitation is 80%.
Monday
Partly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chesterfield MO
 38.67°N 90.57°W (Elev. 446 ft)
Last Update:
4:56 am CDT Jun 18, 2026
Forecast Valid:
5am CDT Jun 18, 2026-6pm CDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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