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

30°F

-1°C

Humidity 69%
Wind Speed E 8 mph
Barometer 30.18 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 8 Feb 8:50 pm CST
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Mostly clear, with a low around 28. East wind around 6 mph becoming calm after midnight.

    Low: 28 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 53. Calm wind becoming south around 6 mph in the afternoon.

    High: 53 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Southeast wind 5 to 7 mph becoming west after midnight.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. West wind 5 to 9 mph becoming north in the afternoon.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32. North wind around 6 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 28. East wind around 6 mph becoming calm after midnight.
Monday
Mostly sunny, with a high near 53. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 40. Southeast wind 5 to 7 mph becoming west after midnight.
Tuesday
Mostly sunny, with a high near 58. West wind 5 to 9 mph becoming north in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 32. North wind around 6 mph.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 45.
Thursday Night
A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 32.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 45.
Friday Night
A 30 percent chance of rain. Partly cloudy, with a low around 31.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 46.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 33.
Sunday
A slight chance of rain and snow. Sunny, with a high near 50. Chance of precipitation is 20%.
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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:
7:21 pm CST Feb 8, 2026
Forecast Valid:
9pm CST Feb 8, 2026-6pm CST Feb 15, 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