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

54°F

12°C

Humidity 44%
Wind Speed S 5 mph
Barometer 30.04 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 9 Feb 3:50 pm CST
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: Mostly clear, with a low around 43. Southeast wind 6 to 8 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 60. Southwest wind 6 to 13 mph becoming north in the morning. Winds could gust as high as 20 mph.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30. North wind 5 to 8 mph.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 50. North wind around 6 mph.

    High: 50 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32. Light and variable wind.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Chance Rain

  • Friday

    Friday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 43. Southeast wind 6 to 8 mph.
Tuesday
Sunny, with a high near 60. Southwest wind 6 to 13 mph becoming north in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 30. North wind 5 to 8 mph.
Wednesday
Mostly sunny, with a high near 50. North wind around 6 mph.
Wednesday Night
Mostly cloudy, with a low around 32. Light and variable wind.
Thursday
Mostly cloudy, with a high near 46.
Thursday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 32.
Friday
Partly sunny, with a high near 47.
Friday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 47. Chance of precipitation is 70%.
Saturday Night
Rain. Low around 37. Chance of precipitation is 80%.
Sunday
A 40 percent chance of rain. Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 34.
Washington's Birthday
Mostly sunny, with a high near 58.
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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:
1:41 pm CST Feb 9, 2026
Forecast Valid:
4pm CST Feb 9, 2026-6pm CST Feb 16, 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