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

32°F

0°C

Humidity 80%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 17 Nov 6:50 am CST
Extended Forecast for

West Alton MO

  • Today

    Today: A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 58. Southeast wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 58 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 49. Southeast wind 9 to 14 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before 8am. Partly sunny, with a high near 73. Southeast wind 8 to 10 mph becoming northwest in the afternoon.

    High: 73 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 45. North wind 3 to 8 mph.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60. Light northeast wind.

    High: 60 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain, with thunderstorms also possible after noon. High near 65. Chance of precipitation is 90%.

    High: 65 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Cloudy, with a low around 53. Chance of precipitation is 70%.

    Low: 53 °F

    Rain Likely

  • Friday

    Friday: Rain likely, mainly before noon. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Rain Likely

Detailed Forecast

Today
A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 58. Southeast wind 6 to 14 mph, with gusts as high as 21 mph.
Tonight
A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 49. Southeast wind 9 to 14 mph. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of showers, mainly before 8am. Partly sunny, with a high near 73. Southeast wind 8 to 10 mph becoming northwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 45. North wind 3 to 8 mph.
Wednesday
Mostly cloudy, with a high near 60. Light northeast wind.
Wednesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 48.
Thursday
Rain, with thunderstorms also possible after noon. High near 65. Chance of precipitation is 90%.
Thursday Night
Rain likely and possibly a thunderstorm. Cloudy, with a low around 53. Chance of precipitation is 70%.
Friday
Rain likely, mainly before noon. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 43.
Saturday
Partly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
West Alton MO
 38.84°N 90.22°W (Elev. 407 ft)
Last Update:
3:16 am CST Nov 17, 2025
Forecast Valid:
7am CST Nov 17, 2025-6pm CST Nov 23, 2025
 
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