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

54°F

12°C

Humidity 67%
Wind Speed W 7 mph
Barometer 30.12 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 22 Nov 3:45 pm CST
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 42. West wind 3 to 5 mph.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, sunny, with a high near 58. Light and variable wind.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 42. Calm wind becoming southeast around 6 mph after midnight.

    Low: 42 °F

    Increasing
    Clouds

  • Monday

    Monday: Rain likely after noon. Cloudy, with a high near 57. Southeast wind 6 to 10 mph. Chance of precipitation is 60%.

    High: 57 °F

    Mostly Cloudy
    then Rain
    Likely

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 49. Southeast wind 5 to 9 mph becoming light south after midnight. Chance of precipitation is 90%.

    Low: 49 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 42. West wind 3 to 5 mph.
Sunday
Patchy fog before 9am. Otherwise, sunny, with a high near 58. Light and variable wind.
Sunday Night
Increasing clouds, with a low around 42. Calm wind becoming southeast around 6 mph after midnight.
Monday
Rain likely after noon. Cloudy, with a high near 57. Southeast wind 6 to 10 mph. Chance of precipitation is 60%.
Monday Night
Rain, mainly before midnight. Low around 49. Southeast wind 5 to 9 mph becoming light south after midnight. Chance of precipitation is 90%.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 35.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 28.
Thanksgiving Day
Sunny, with a high near 45.
Thursday Night
Partly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 46.
Friday Night
A slight chance of rain and snow. Partly cloudy, with a low around 29. Chance of precipitation is 20%.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
3:16 pm CST Nov 22, 2025
Forecast Valid:
4pm CST Nov 22, 2025-6pm CST Nov 29, 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