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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair and Breezy

45°F

7°C

Humidity 34%
Wind Speed S 21 G 33 mph
Barometer 29.71 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 24 Feb 12:50 pm CST
Extended Forecast for

Chesterfield IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 52. Breezy, with a south wind 15 to 23 mph, with gusts as high as 34 mph.

    High: 52 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 49. North wind 3 to 6 mph.

    High: 49 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain and snow before midnight, then a chance of snow between midnight and 3am, then a chance of rain after 3am. Mostly cloudy, with a low around 31. East wind 3 to 7 mph. Chance of precipitation is 50%.

    Low: 31 °F

    Chance
    Rain/Snow

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 49. East wind 5 to 7 mph becoming west in the afternoon.

    High: 49 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 52. Breezy, with a south wind 15 to 23 mph, with gusts as high as 34 mph.
Tonight
Mostly cloudy, with a low around 30. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Wednesday
Partly sunny, with a high near 49. North wind 3 to 6 mph.
Wednesday Night
A chance of rain and snow before midnight, then a chance of snow between midnight and 3am, then a chance of rain after 3am. Mostly cloudy, with a low around 31. East wind 3 to 7 mph. Chance of precipitation is 50%.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 49. East wind 5 to 7 mph becoming west in the afternoon.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 37.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
A slight chance of rain and snow. Partly cloudy, with a low around 27. Chance of precipitation is 20%.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 42. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 50%.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 45. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chesterfield IL
 39.26°N 90.06°W (Elev. 600 ft)
Last Update:
12:26 pm CST Feb 24, 2026
Forecast Valid:
1pm CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation