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.

Mostly Cloudy

71°F

22°C

Humidity 96%
Wind Speed Calm
Barometer 29.96 in (1013.7 mb)
Dewpoint 70°F (21°C)
Visibility 7.00 mi
Last update 14 Aug 2:54 am CDT
Extended Forecast for

Chesterfield MO

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly clear, with a low around 69. Light north wind.

    Low: 69 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 87. Light northeast wind.

    High: 87 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. East wind around 5 mph becoming light and variable after midnight.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 95. Heat index values as high as 102. Light south wind.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 69. Light north wind.
Thursday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 87. Light northeast wind.
Thursday Night
Mostly clear, with a low around 72. East wind around 5 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 95. Heat index values as high as 102. Light south wind.
Friday Night
Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny and hot, with a high near 97.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Sunny and hot, with a high near 98.
Sunday Night
Partly cloudy, with a low around 75.
Monday
Mostly sunny, with a high near 96.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chesterfield MO
 38.65°N 90.57°W (Elev. 512 ft)
Last Update:
10:21 pm CDT Aug 13, 2025
Forecast Valid:
3am CDT Aug 14, 2025-6pm CDT Aug 20, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation