National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

79°F

26°C

Humidity 77%
Wind Speed S 10 mph
Barometer 29.78 in (1008.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 21 Jun 11:53 am CDT
Extended Forecast for

Alorton IL

Flood Watch June 21, 12:16pm until June 22, 07:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 21, 12:16pm until June 22, 07:00am

    NOW until 7:00am Mon

    Flood Watch

  • This Afternoon

    High: 81 °F

    Heavy Rain

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 66. Southwest wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 40%.

    Low: 66 °F

    Scattered
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 78. North wind 8 to 10 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming clear, with a low around 62. North wind 5 to 7 mph becoming calm in the evening.

    Low: 62 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. Light northeast wind.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.

    High: 86 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

This Afternoon
Showers and thunderstorms, mainly before 5pm. Some of the storms could produce heavy rainfall. High near 81. South wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Tonight
Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 66. Southwest wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 40%.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 78. North wind 8 to 10 mph.
Monday Night
Mostly cloudy, then gradually becoming clear, with a low around 62. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 83. Light northeast wind.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 20%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alorton IL
 38.59°N 90.12°W (Elev. 413 ft)
Last Update:
11:41 am CDT Jun 21, 2026
Forecast Valid:
12pm CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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