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

68°F

20°C

Humidity 82%
Wind Speed SW 3 mph
Barometer 30.02 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 20 Jun 4:35 am CDT
Extended Forecast for

4 Miles N Chesterfield IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • Today

    Today: Partly sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.

    High: 83 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 64. Light and variable wind becoming east around 6 mph after midnight.

    Low: 64 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms, mainly after 10am. Some of the storms could produce heavy rainfall. High near 80. East wind 8 to 14 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 100%.

    High: 80 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 1am. Low around 59. Southwest wind 7 to 9 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 59 °F

    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76. North wind around 10 mph.

    High: 76 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 64. Light and variable wind becoming east around 6 mph after midnight.
Sunday
Showers and thunderstorms, mainly after 10am. Some of the storms could produce heavy rainfall. High near 80. East wind 8 to 14 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 100%.
Sunday Night
Showers and thunderstorms, mainly before 1am. Low around 59. Southwest wind 7 to 9 mph becoming north after midnight. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 76. North wind around 10 mph.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 58.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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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:
2:56 am CDT Jun 20, 2026
Forecast Valid:
4am CDT Jun 20, 2026-6pm CDT Jun 26, 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