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

28°F

-2°C

Humidity 69%
Wind Speed NW 12 mph
Barometer 30.21 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 21 Feb 7:45 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: A chance of flurries before 11am. Mostly cloudy, with a high near 41. Northwest wind 9 to 13 mph.

    High: 41 °F

    Chance
    Flurries

  • Tonight

    Tonight: Mostly clear, with a low around 22. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 34. Breezy, with a northwest wind 15 to 22 mph, with gusts as high as 32 mph.

    High: 34 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16. Northwest wind 14 to 16 mph, with gusts as high as 25 mph.

    Low: 16 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 34. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

Detailed Forecast

Today
A chance of flurries before 11am. Mostly cloudy, with a high near 41. Northwest wind 9 to 13 mph.
Tonight
Mostly clear, with a low around 22. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 34. Breezy, with a northwest wind 15 to 22 mph, with gusts as high as 32 mph.
Sunday Night
Partly cloudy, with a low around 16. Northwest wind 14 to 16 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 34. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Partly sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 62.
Wednesday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 36.
Thursday
A slight chance of rain and snow. Mostly sunny, with a high near 53. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 62.
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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:
7:26 am CST Feb 21, 2026
Forecast Valid:
8am CST Feb 21, 2026-6pm CST Feb 27, 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