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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

57°F

14°C

Humidity 82%
Wind Speed SW 8 mph
Barometer 29.65 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 18 Feb 7:50 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Sunny, with a high near 72. West wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 50. Southeast wind 3 to 7 mph.

    Low: 50 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 69. Southeast wind 7 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph.

    High: 69 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36. West wind 11 to 17 mph, with gusts as high as 26 mph.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 49. West wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 49 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow. Partly sunny, with a high near 43.

    High: 43 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Partly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 72. West wind 6 to 11 mph, with gusts as high as 21 mph.
Tonight
Increasing clouds, with a low around 50. Southeast wind 3 to 7 mph.
Thursday
A 40 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 69. Southeast wind 7 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph.
Thursday Night
Mostly clear, with a low around 36. West wind 11 to 17 mph, with gusts as high as 26 mph.
Friday
Sunny, with a high near 49. West wind 9 to 16 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 43.
Saturday Night
A 30 percent chance of snow before midnight. Partly cloudy, with a low around 24.
Sunday
Sunny, with a high near 38.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 37.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Mostly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
6:21 am CST Feb 18, 2026
Forecast Valid:
8am CST Feb 18, 2026-6pm CST Feb 24, 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