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.

Fog/Mist

46°F

8°C

Humidity 93%
Wind Speed Calm
Barometer 30.22 in
Dewpoint 45°F (7°C)
Visibility 3.00 mi
Last update 19 Nov 10:45 am CST
Extended Forecast for

East Alton IL

  • Today

    Today: Cloudy, with a high near 52. Light and variable wind.

    High: 52 °F

    Cloudy

  • Tonight

    Tonight: A 20 percent chance of showers after 5am. Cloudy, with a low around 47. Southeast wind 3 to 5 mph.

    Low: 47 °F

    Cloudy then
    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 3pm. Cloudy, with a high near 60. Southeast wind 6 to 8 mph. Chance of precipitation is 40%.

    High: 60 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then rain likely and possibly a thunderstorm between midnight and 1am, then rain likely after 1am. Cloudy, with a low around 53. East wind around 6 mph becoming calm. Chance of precipitation is 70%.

    Low: 53 °F

    Showers
    Likely

  • Friday

    Friday: Rain. High near 62. East wind 5 to 9 mph. Chance of precipitation is 80%.

    High: 62 °F

    Rain

  • Friday Night

    Friday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.

    Low: 47 °F

    Rain Likely
    then Slight
    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 44 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

Today
Cloudy, with a high near 52. Light and variable wind.
Tonight
A 20 percent chance of showers after 5am. Cloudy, with a low around 47. Southeast wind 3 to 5 mph.
Thursday
A chance of showers, with thunderstorms also possible after 3pm. Cloudy, with a high near 60. Southeast wind 6 to 8 mph. Chance of precipitation is 40%.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then rain likely and possibly a thunderstorm between midnight and 1am, then rain likely after 1am. Cloudy, with a low around 53. East wind around 6 mph becoming calm. Chance of precipitation is 70%.
Friday
Rain. High near 62. East wind 5 to 9 mph. Chance of precipitation is 80%.
Friday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Mostly sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 43.
Monday
A 20 percent chance of rain. Partly sunny, with a high near 61.
Monday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 44.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 57.
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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:
11:06 am CST Nov 19, 2025
Forecast Valid:
11am CST Nov 19, 2025-6pm CST Nov 25, 2025
 
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