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

86°F

30°C

Humidity 38%
Wind Speed S 9 mph
Barometer 30.15 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 3 Oct 4:50 pm CDT
Extended Forecast for

Chesterfield IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 88. Southwest wind around 5 mph.

    High: 88 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Clear, with a low around 62. South wind 3 to 6 mph.

    Low: 62 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. South wind 5 to 10 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 57. South wind around 7 mph.

    Low: 57 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 85. South wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 85 °F

    Sunny

  • Sunday Night

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

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 85.

    High: 85 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 88. Southwest wind around 5 mph.
Tonight
Clear, with a low around 62. South wind 3 to 6 mph.
Saturday
Sunny, with a high near 85. South wind 5 to 10 mph.
Saturday Night
Clear, with a low around 57. South wind around 7 mph.
Sunday
Sunny, with a high near 85. South wind 7 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 61.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 85.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61.
Tuesday
A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 77.
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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:
5:11 pm CDT Oct 3, 2025
Forecast Valid:
5pm CDT Oct 3, 2025-6pm CDT Oct 10, 2025
 
Forecast Discussion
 
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Additional Resources

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