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NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Overcast

55°F

13°C

Humidity 70%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 21 May 3:35 am CDT
Extended Forecast for

Chesterfield IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 54. Northeast wind around 9 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 67. East wind around 11 mph, with gusts as high as 20 mph.

    High: 67 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Cloudy, with a low around 52. East wind 7 to 10 mph.

    Low: 52 °F

    Cloudy

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 4pm. Cloudy, with a high near 68. East wind around 10 mph. Chance of precipitation is 60%.

    High: 68 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. East wind 5 to 8 mph becoming light and variable. Chance of precipitation is 50%.

    Low: 54 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.

    High: 79 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 54. Northeast wind around 9 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, with a high near 67. East wind around 11 mph, with gusts as high as 20 mph.
Thursday Night
Cloudy, with a low around 52. East wind 7 to 10 mph.
Friday
Showers likely, with thunderstorms also possible after 4pm. Cloudy, with a high near 68. East wind around 10 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. East wind 5 to 8 mph becoming light and variable. Chance of precipitation is 50%.
Saturday
Partly sunny, with a high near 78.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 56.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.
Sunday Night
Mostly cloudy, with a low around 57.
Memorial Day
Partly sunny, with a high near 81.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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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:
1:51 am CDT May 21, 2026
Forecast Valid:
3am CDT May 21, 2026-6pm CDT May 27, 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