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

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

72°F

22°C

Humidity 73%
Wind Speed SE 3 mph
Barometer 29.89 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 1 Oct 4:55 am CDT
Extended Forecast for

West Alton MO

  • Today

    Today: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 88. South wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 50%.

    High: 88 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 62. Northwest wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    Low: 62 °F

    Showers

  • Friday

    Friday: A 30 percent chance of showers, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 70. North wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 70 °F

    Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 50. Northeast wind 6 to 10 mph.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 73. East wind around 7 mph.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 88. South wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 50%.
Tonight
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 62. Northwest wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Friday
A 30 percent chance of showers, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 70. North wind 11 to 13 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 50. Northeast wind 6 to 10 mph.
Saturday
Sunny, with a high near 73. East wind around 7 mph.
Saturday Night
Mostly clear, with a low around 53.
Sunday
Sunny, with a high near 76.
Sunday Night
Clear, with a low around 52.
Monday
Sunny, with a high near 72.
Monday Night
Clear, with a low around 48.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
West Alton MO
 38.86°N 90.22°W (Elev. 427 ft)
Last Update:
4:36 am CDT Oct 1, 2026
Forecast Valid:
5am CDT Oct 1, 2026-6pm CDT Oct 7, 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