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.

Fair

40°F

4°C

Humidity 97%
Wind Speed Calm
Barometer 30.04 in (1017.3 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 7 May 3:53 am CDT
Extended Forecast for

Alorton IL

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 69. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 69 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. South wind 3 to 6 mph.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 76. Southwest wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 76 °F

    Mostly Sunny
    then Showers
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms before 10pm, then showers between 10pm and 1am. Low around 52. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Sunny, with a high near 81. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 1am. Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 69. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 50. South wind 3 to 6 mph.
Friday
A chance of showers before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 76. Southwest wind 5 to 10 mph. Chance of precipitation is 70%.
Friday Night
Showers and thunderstorms before 10pm, then showers between 10pm and 1am. Low around 52. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.
Saturday
Sunny, with a high near 81. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Saturday Night
A 40 percent chance of showers after 1am. Partly cloudy, with a low around 57.
Sunday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 70.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 73.
Monday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 52.
Tuesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 80.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 59.
Wednesday
Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Alorton IL
 38.59°N 90.12°W (Elev. 413 ft)
Last Update:
3:41 am CDT May 7, 2026
Forecast Valid:
4am CDT May 7, 2026-6pm CDT May 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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