National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

43°F

6°C

Humidity 76%
Wind Speed SW 3 mph
Barometer 30.28 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 6 Apr 2:55 am CDT
Extended Forecast for

East Alton IL

  • Overnight

    Overnight: Clear, with a low around 38. West wind around 5 mph.

    Low: 38 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain after 3am. Increasing clouds, with a low around 37. Northeast wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 53. East wind around 10 mph.

    High: 53 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. East wind around 9 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a low around 38. West wind around 5 mph.
Monday
Sunny, with a high near 62. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Monday Night
A 20 percent chance of rain after 3am. Increasing clouds, with a low around 37. Northeast wind 8 to 10 mph, with gusts as high as 21 mph.
Tuesday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 53. East wind around 10 mph.
Tuesday Night
Mostly cloudy, with a low around 40. East wind around 9 mph.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Alton IL
 38.88°N 90.13°W (Elev. 433 ft)
Last Update:
2:41 am CDT Apr 6, 2026
Forecast Valid:
3am CDT Apr 6, 2026-6pm CDT Apr 12, 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