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

34°F

1°C

Humidity 43%
Wind Speed S 10 mph
Barometer 30.07 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 21 Jan 4:15 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 45. West wind 9 to 17 mph, with gusts as high as 29 mph.

    High: 45 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 23. West wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 24 mph.

    Low: 23 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 38. West wind 3 to 6 mph.

    High: 38 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 7. Light northwest wind becoming north 10 to 15 mph in the evening. Winds could gust as high as 23 mph.

    Low: 7 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 14. North wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 14 °F

    Cold

  • Friday Night

    Friday Night: Cloudy, with a low around 1.

    Low: 1 °F

    Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 13.

    High: 13 °F

    Slight Chance
    Snow then
    Chance Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.

    Low: 7 °F

    Chance Snow
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.

    High: 20 °F

    Slight Chance
    Snow then
    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 45. West wind 9 to 17 mph, with gusts as high as 29 mph.
Tonight
Mostly clear, with a low around 23. West wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 24 mph.
Thursday
Partly sunny, with a high near 38. West wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around 7. Light northwest wind becoming north 10 to 15 mph in the evening. Winds could gust as high as 23 mph.
Friday
Mostly cloudy and cold, with a high near 14. North wind 11 to 15 mph, with gusts as high as 23 mph.
Friday Night
Cloudy, with a low around 1.
Saturday
A 50 percent chance of snow, mainly after noon. Cloudy and cold, with a high near 13.
Saturday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.
Sunday
A 20 percent chance of snow before noon. Partly sunny and cold, with a high near 20.
Sunday Night
Partly cloudy, with a low around 4.
Monday
Sunny, with a high near 23.
Monday Night
Mostly clear, with a low around 10.
Tuesday
Mostly sunny, with a high near 35.
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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:
4:26 am CST Jan 21, 2026
Forecast Valid:
4am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation