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

37°F

3°C

Humidity 28%
Wind Speed S 9 mph
Barometer 30.19 in (1023.2 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 20 Jan 6:54 pm CST
Extended Forecast for

Chesterfield MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 31. South wind 7 to 10 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 43. West wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 43 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 23. Southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 23 mph.

    Low: 23 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 38. North wind 3 to 5 mph.

    High: 38 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 10. Light north wind increasing to 8 to 13 mph after midnight. Winds could gust as high as 22 mph.

    Low: 10 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 16.

    High: 16 °F

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 2.

    Low: 2 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Cloudy and cold, with a high near 14.

    High: 14 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.

    Low: 7 °F

    Chance Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 31. South wind 7 to 10 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 43. West wind 8 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 23. Southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 23 mph.
Thursday
Partly sunny, with a high near 38. North wind 3 to 5 mph.
Thursday Night
Mostly cloudy, with a low around 10. Light north wind increasing to 8 to 13 mph after midnight. Winds could gust as high as 22 mph.
Friday
Mostly cloudy and cold, with a high near 16.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 2.
Saturday
A 40 percent chance of snow. Cloudy and cold, with a high near 14.
Saturday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.
Sunday
Partly sunny, with a high near 22.
Sunday Night
Partly cloudy, with a low around 6.
Monday
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly sunny, with a high near 38.
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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:
7:01 pm CST Jan 20, 2026
Forecast Valid:
7pm CST Jan 20, 2026-6pm CST Jan 27, 2026
 
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Additional Resources

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Chance of Precipitation