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.

Partly Cloudy

79°F

26°C

Humidity 70%
Wind Speed W 9 mph
Barometer 29.91 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 15 Oct 5:50 pm CDT
Extended Forecast for

East Alton IL

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then isolated showers between 1am and 3am. Increasing clouds, with a low around 48. Northwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 48 °F

    Showers
    Likely then
    Scattered
    Showers

  • Friday

    Friday: Isolated showers after 4pm. Mostly cloudy, with a high near 57. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    High: 57 °F

    Breezy.
    Partly Sunny
    then Isolated
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 8 to 17 mph, with gusts as high as 29 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 61. North wind around 6 mph becoming calm in the afternoon.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37. Calm wind.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely before 1am, then isolated showers between 1am and 3am. Increasing clouds, with a low around 48. Northwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday
Isolated showers after 4pm. Mostly cloudy, with a high near 57. Breezy, with a northwest wind 17 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 8 to 17 mph, with gusts as high as 29 mph.
Saturday
Sunny, with a high near 61. North wind around 6 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 37. Calm wind.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
East Alton IL
 38.88°N 90.11°W (Elev. 436 ft)
Last Update:
5:41 pm CDT Oct 15, 2026
Forecast Valid:
6pm CDT Oct 15, 2026-6pm CDT Oct 22, 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