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Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

49°F

9°C

Humidity 78%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 14 May 5:15 am CDT
Extended Forecast for

4 Miles ENE Chesterfield IL

  • Today

    Today: Sunny, with a high near 73. Calm wind becoming south around 6 mph in the afternoon.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 52. Southeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 52 °F

    Mostly Clear
    then Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms likely before 10am, then a slight chance of showers between 10am and 11am. Cloudy through mid morning, then gradual clearing, with a high near 79. South wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely then
    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. South wind 8 to 11 mph.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. Southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely

  • Saturday Night

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

    Low: 61 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy.

    High: 87 °F

    Breezy. Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 73. Calm wind becoming south around 6 mph in the afternoon.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 52. Southeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely before 10am, then a slight chance of showers between 10am and 11am. Cloudy through mid morning, then gradual clearing, with a high near 79. South wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. South wind 8 to 11 mph.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. Southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 66.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy.
Monday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 79. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Chesterfield IL
 39.28°N 90°W (Elev. 600 ft)
Last Update:
5:21 am CDT May 14, 2026
Forecast Valid:
5am CDT May 14, 2026-6pm CDT May 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