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

38°F

3°C

Humidity 89%
Wind Speed NA
Barometer 30.28 in
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 6 Nov 1:15 am CST
Extended Forecast for

East Alton IL

  • Overnight

    Overnight: Clear, with a low around 39. North wind 3 to 5 mph.

    Low: 39 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 65. Light east wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 23 mph.

    High: 65 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A slight chance of rain between 2am and 5am. Mostly cloudy, with a low around 54. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    Low: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Mostly cloudy through mid morning, then gradual clearing, with a high near 72. West wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 72 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. West wind around 6 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of rain after noon. Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 39. North wind 3 to 5 mph.
Thursday
Increasing clouds, with a high near 65. Light east wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 23 mph.
Thursday Night
A slight chance of rain between 2am and 5am. Mostly cloudy, with a low around 54. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Friday
Mostly cloudy through mid morning, then gradual clearing, with a high near 72. West wind 8 to 13 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 44. West wind around 6 mph becoming calm in the evening.
Saturday
A 30 percent chance of rain after noon. Partly sunny, with a high near 66.
Saturday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 33.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 44.
Monday Night
Mostly clear, with a low around 28.
Veterans Day
Mostly sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 41.
Wednesday
Sunny, with a high near 64.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Alton IL
 38.88°N 90.13°W (Elev. 433 ft)
Last Update:
1:06 am CST Nov 6, 2025
Forecast Valid:
1am CST Nov 6, 2025-6pm CST Nov 12, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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