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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

64°F

18°C

Humidity 81%
Wind Speed NW 10 G 24 mph
Barometer 29.82 in (1009.5 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 22 Jun 3:53 am CDT
Extended Forecast for

Alorton IL

  • Today

    Today: Mostly cloudy, with a high near 76. North wind 9 to 11 mph.

    High: 76 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 62. North wind 5 to 8 mph becoming calm in the evening.

    Low: 62 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Sunny, with a high near 83. Calm wind becoming east around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 65. East wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind becoming south 5 to 7 mph in the morning.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Mostly cloudy, with a high near 76. North wind 9 to 11 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 62. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 83. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 65. East wind around 5 mph becoming calm in the evening.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind becoming south 5 to 7 mph in the morning.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 68.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 40%.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Sunday
Mostly sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Alorton IL
 38.59°N 90.12°W (Elev. 413 ft)
Last Update:
4:10 am CDT Jun 22, 2026
Forecast Valid:
4am CDT Jun 22, 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