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

57°F

14°C

Humidity 36%
Wind Speed NW 14 G 25 mph
Barometer 30.28 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 5 Apr 5:50 pm CDT
Extended Forecast for

3 Miles N West Alton MO

  • Tonight

    Tonight: Clear, with a low around 41. Northwest wind 8 to 13 mph becoming light west.

    Low: 41 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 60. Northwest wind 7 to 11 mph.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: A chance of rain showers after 1am, mixing with snow after 4am. Increasing clouds, with a low around 38. North wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 38 °F

    Partly Cloudy
    then Chance
    Rain/Snow

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53. East wind 8 to 10 mph.

    High: 53 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41. Southeast wind around 9 mph.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 41. Northwest wind 8 to 13 mph becoming light west.
Monday
Sunny, with a high near 60. Northwest wind 7 to 11 mph.
Monday Night
A chance of rain showers after 1am, mixing with snow after 4am. Increasing clouds, with a low around 38. North wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 53. East wind 8 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 41. Southeast wind around 9 mph.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 57.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N West Alton MO
 38.91°N 90.22°W (Elev. 407 ft)
Last Update:
5:36 pm CDT Apr 5, 2026
Forecast Valid:
6pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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