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.

Mostly Cloudy

21°F

-6°C

Humidity 54%
Wind Speed NE 6 mph
Barometer 30.34 in
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 29 Jan 10:50 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: A 40 percent chance of snow, mainly after 5pm. Cloudy, with a high near 23. Northeast wind around 7 mph.

    High: 23 °F

    Chance Snow

  • Tonight

    Tonight: A 50 percent chance of snow, mainly before 10pm. Cloudy, with a low around 5. North wind 3 to 6 mph.

    Low: 5 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. Light north wind increasing to 5 to 10 mph in the morning.

    High: 18 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 4. Wind chill values as low as -10. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 4 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny and cold, with a high near 20. Northwest wind 7 to 11 mph.

    High: 20 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

Detailed Forecast

Today
A 40 percent chance of snow, mainly after 5pm. Cloudy, with a high near 23. Northeast wind around 7 mph.
Tonight
A 50 percent chance of snow, mainly before 10pm. Cloudy, with a low around 5. North wind 3 to 6 mph.
Friday
Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. Light north wind increasing to 5 to 10 mph in the morning.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 4. Wind chill values as low as -10. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday
Sunny and cold, with a high near 20. Northwest wind 7 to 11 mph.
Saturday Night
Mostly clear, with a low around 1.
Sunday
Partly sunny, with a high near 28.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 24.
Wednesday
A 30 percent chance of snow. Mostly cloudy, 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:
11:07 am CST Jan 29, 2026
Forecast Valid:
11am CST Jan 29, 2026-6pm CST Feb 4, 2026
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation