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

42°F

6°C

Humidity 88%
Wind Speed SE 5 mph
Barometer 29.95 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 17 Feb 4:15 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Mostly cloudy, with a high near 62. South wind 6 to 16 mph, with gusts as high as 29 mph.

    High: 62 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of rain between midnight and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 53. Breezy, with a south wind 13 to 21 mph becoming southwest after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 20%.

    Low: 53 °F

    Mostly Cloudy
    and Breezy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Sunny, with a high near 71. West wind 7 to 13 mph, with gusts as high as 22 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 48. South wind around 6 mph.

    Low: 48 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 72. South wind 6 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 37.

    Low: 37 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Friday Night

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

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow, mainly after noon. Mostly sunny, with a high near 45.

    High: 45 °F

    Chance Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 62. South wind 6 to 16 mph, with gusts as high as 29 mph.
Tonight
A slight chance of rain between midnight and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 53. Breezy, with a south wind 13 to 21 mph becoming southwest after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 71. West wind 7 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
A 20 percent chance of showers after midnight. Partly cloudy, with a low around 48. South wind around 6 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 72. South wind 6 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 37.
Friday
Sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 30.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly sunny, with a high near 45.
Saturday Night
A 20 percent chance of snow before midnight. Mostly clear, with a low around 26.
Sunday
Sunny, with a high near 40.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 40.
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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:
1:01 am CST Feb 17, 2026
Forecast Valid:
4am CST Feb 17, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation