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.

Overcast

61°F

16°C

Humidity 88%
Wind Speed E 3 mph
Barometer 30.00 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 3 Apr 7:50 am CDT
Extended Forecast for

Chesterfield IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 79. East wind 5 to 10 mph becoming south 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 79 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 55. South wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    Low: 55 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a temperature falling to around 54 by 5pm. West wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    High: 59 °F⇓

    Showers
    Likely then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35. Northwest wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 56. Northwest wind 9 to 14 mph.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 79. East wind 5 to 10 mph becoming south 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 55. South wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Saturday
Showers likely and possibly a thunderstorm before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a temperature falling to around 54 by 5pm. West wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 35. Northwest wind 9 to 14 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 56. Northwest wind 9 to 14 mph.
Sunday Night
Clear, with a low around 36.
Monday
Sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Partly sunny, with a high near 68.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 74.
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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:
4:51 am CDT Apr 3, 2026
Forecast Valid:
7am CDT Apr 3, 2026-6pm CDT Apr 9, 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