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

73°F

23°C

Humidity 89%
Wind Speed SW 9 mph
Barometer 29.73 in
Dewpoint 70°F (21°C)
Visibility 7.00 mi
Last update 21 Jun 2:50 pm CDT
Extended Forecast for

4 Miles NE Chesterfield IL

Flood Watch June 21, 03:38pm until June 22, 01:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 21, 03:38pm until June 22, 01:00am

    NOW until 1:00am Mon

    Flood Watch

  • This Afternoon

    High: 76 °F

    Heavy Rain

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 59. Southwest wind 8 to 11 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 30%.

    Low: 59 °F

    Scattered
    T-storms then
    Cloudy

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 73. North wind around 11 mph.

    High: 73 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. North wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. Light east wind.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 81. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.

    Low: 63 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Showers and thunderstorms, mainly before 4pm. Some of the storms could produce heavy rainfall. High near 76. South wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Tonight
Scattered showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 59. Southwest wind 8 to 11 mph becoming northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 73. North wind around 11 mph.
Monday Night
Mostly clear, with a low around 55. North wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 79. Light east wind.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Thursday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 61.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Chesterfield IL
 39.3°N 90.03°W (Elev. 571 ft)
Last Update:
1:26 pm CDT Jun 21, 2026
Forecast Valid:
3pm CDT Jun 21, 2026-6pm CDT Jun 28, 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