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.

Partly Cloudy

62°F

17°C

Humidity 94%
Wind Speed NA
Barometer 30.03 in
Dewpoint 60°F (16°C)
Visibility 7.00 mi
Last update 20 Sep 5:55 am CDT
Extended Forecast for

4 Miles N Chesterfield IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Northeast wind around 6 mph becoming light and variable after midnight.

    Low: 64 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 83. Southwest wind 5 to 9 mph.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 63. South wind 3 to 5 mph. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. South wind 6 to 8 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77.

    High: 77 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.

    Low: 62 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.
Tonight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Northeast wind around 6 mph becoming light and variable after midnight.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 83. Southwest wind 5 to 9 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 63. South wind 3 to 5 mph. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. South wind 6 to 8 mph. Chance of precipitation is 60%.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 73.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Chesterfield IL
 39.3°N 90.09°W (Elev. 515 ft)
Last Update:
5:56 am CDT Sep 20, 2025
Forecast Valid:
6am CDT Sep 20, 2025-6pm CDT Sep 26, 2025
 
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