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.

Overcast

27°F

-3°C

Humidity 59%
Wind Speed Calm
Barometer 30.25 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Last update 28 Jan 4:45 pm CST
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 11. Calm wind becoming northeast around 5 mph after midnight.

    Low: 11 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 23. Northeast wind 3 to 7 mph.

    High: 23 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 6. Northeast wind 3 to 6 mph.

    Low: 6 °F

    Chance Snow

  • Friday

    Friday: Partly sunny and cold, with a high near 19. North wind 5 to 10 mph.

    High: 19 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around 4. North wind 8 to 10 mph.

    Low: 4 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 18.

    High: 18 °F

    Cold

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 2.

    Low: 2 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 11. Calm wind becoming northeast around 5 mph after midnight.
Thursday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 23. Northeast wind 3 to 7 mph.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 6. Northeast wind 3 to 6 mph.
Friday
Partly sunny and cold, with a high near 19. North wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 4. North wind 8 to 10 mph.
Saturday
Mostly sunny and cold, with a high near 18.
Saturday Night
Partly cloudy, with a low around 2.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 14.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 20.
Tuesday
Mostly cloudy, with a high near 37.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
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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:
5:36 pm CST Jan 28, 2026
Forecast Valid:
5pm CST Jan 28, 2026-6pm CST Feb 4, 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