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

71°F

22°C

Humidity 94%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 14 Jun 10:15 pm CDT
Extended Forecast for

East Alton IL

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, mostly clear, with a low around 67. Northeast wind 3 to 5 mph.

    Low: 67 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. Northeast wind around 6 mph.

    High: 86 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 69. East wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 84 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 89. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 60%.

    High: 88 °F

    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 67. Northeast wind 3 to 5 mph.
Sunday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 86. Northeast wind around 6 mph.
Sunday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 69. East wind 3 to 5 mph. Chance of precipitation is 30%.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 71.
Juneteenth
Sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 93.
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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:
9:52 pm CDT Jun 14, 2025
Forecast Valid:
10pm CDT Jun 14, 2025-6pm CDT Jun 21, 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