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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

A Few Clouds

21°F

-6°C

Humidity 63%
Wind Speed NW 15 G 23 mph
Barometer 30.38 in
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 22 Feb 6:45 am CST
Extended Forecast for

4 Miles ENE Chesterfield IL

  • Today

    Today: Partly sunny, with a high near 29. Blustery, with a northwest wind 20 to 24 mph, with gusts as high as 33 mph.

    High: 29 °F

    Partly Sunny
    and Blustery

  • Tonight

    Tonight: Mostly cloudy, with a low around 12. Northwest wind 15 to 18 mph, with gusts as high as 29 mph.

    Low: 12 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 31. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 31 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 17. Calm wind becoming south 5 to 9 mph after midnight.

    Low: 17 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52. South wind 10 to 18 mph, with gusts as high as 28 mph.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.

    Low: 33 °F

    Rain Likely

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Mostly sunny, with a high near 48.

    High: 48 °F

    Chance Rain
    then Mostly
    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 29. Blustery, with a northwest wind 20 to 24 mph, with gusts as high as 33 mph.
Tonight
Mostly cloudy, with a low around 12. Northwest wind 15 to 18 mph, with gusts as high as 29 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 31. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Monday Night
Increasing clouds, with a low around 17. Calm wind becoming south 5 to 9 mph after midnight.
Tuesday
Mostly cloudy, with a high near 52. South wind 10 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly sunny, with a high near 52.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 48.
Thursday Night
Mostly clear, with a low around 27.
Friday
Sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 37.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Chesterfield IL
 39.28°N 90°W (Elev. 600 ft)
Last Update:
4:31 am CST Feb 22, 2026
Forecast Valid:
7am CST Feb 22, 2026-6pm CST Feb 28, 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