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.

Fair

43°F

6°C

Humidity 52%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 14 Mar 12:35 am CDT
Extended Forecast for

4 Miles NW Chesterfield IL

  • Overnight

    Overnight: Partly cloudy, with a low around 33. Northeast wind 3 to 6 mph.

    Low: 33 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 59. Southeast wind 7 to 16 mph, with gusts as high as 23 mph.

    High: 59 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 49. Southeast wind 11 to 16 mph, with gusts as high as 28 mph.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 67. Breezy, with a south wind 18 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 90%.

    High: 67 °F

    Breezy.
    Chance Rain
    then Showers

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then snow likely after 1am. Some thunder is also possible. Low around 19. Blustery, with a west wind 22 to 26 mph, with gusts as high as 46 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 25. Blustery.

    High: 25 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 9. Blustery.

    Low: 9 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 33.

    High: 33 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.

    Low: 24 °F

    Chance Snow
    then Chance
    Rain/Snow

Detailed Forecast

Overnight
Partly cloudy, with a low around 33. Northeast wind 3 to 6 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 59. Southeast wind 7 to 16 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 49. Southeast wind 11 to 16 mph, with gusts as high as 28 mph.
Sunday
A chance of rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 67. Breezy, with a south wind 18 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then snow likely after 1am. Some thunder is also possible. Low around 19. Blustery, with a west wind 22 to 26 mph, with gusts as high as 46 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Monday
A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 25. Blustery.
Monday Night
Mostly clear, with a low around 9. Blustery.
Tuesday
Sunny, with a high near 33.
Tuesday Night
A chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Wednesday
Mostly sunny, with a high near 59.
Wednesday Night
Mostly clear, with a low around 35.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Mostly clear, with a low around 41.
Friday
Sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Chesterfield IL
 39.3°N 90.12°W (Elev. 522 ft)
Last Update:
11:46 pm CDT Mar 13, 2026
Forecast Valid:
1am CDT Mar 14, 2026-6pm CDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation