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

53°F

12°C

Humidity 37%
Wind Speed W 8 mph
Barometer 30.14 in (1020.7 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 18 Apr 7:54 pm CDT
Extended Forecast for

Chesterfield MO

  • Tonight

    Tonight: Clear, with a low around 40. Southwest wind 3 to 8 mph.

    Low: 40 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 69. West wind 5 to 14 mph, with gusts as high as 26 mph.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. Northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 41 °F

    Mostly Clear

  • Monday

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

    High: 69 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. Southeast wind around 7 mph becoming southwest after midnight.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 40. Southwest wind 3 to 8 mph.
Sunday
Sunny, with a high near 69. West wind 5 to 14 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 41. Northeast wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 69. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night
Mostly clear, with a low around 52. Southeast wind around 7 mph becoming southwest after midnight.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. Chance of precipitation is 70%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 49.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chesterfield MO
 38.65°N 90.6°W (Elev. 466 ft)
Last Update:
5:56 pm CDT Apr 18, 2026
Forecast Valid:
8pm 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