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Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

70°F

21°C

Humidity 94%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 68°F (20°C)
Visibility 8.00 mi
Last update 21 Sep 7:50 am CDT
Extended Forecast for

Alton IL

  • Today

    Today: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 89. Southeast wind 5 to 8 mph becoming west in the afternoon. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 70. South wind 3 to 6 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 82. Light and variable wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 80%.

    High: 82 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 66. West wind around 6 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 66 °F

    Showers

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 74. North wind 5 to 7 mph.

    High: 74 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 73.

    High: 73 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 89. Southeast wind 5 to 8 mph becoming west in the afternoon. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 70. South wind 3 to 6 mph. Chance of precipitation is 60%.
Sunday
Showers and possibly a thunderstorm. High near 82. Light and variable wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm. Low around 66. West wind around 6 mph becoming north after midnight. Chance of precipitation is 80%.
Monday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 74. North wind 5 to 7 mph.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 73.
Tuesday Night
Mostly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 57.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 79.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Alton IL
 38.91°N 90.16°W (Elev. 505 ft)
Last Update:
5:22 am CDT Sep 21, 2024
Forecast Valid:
8am CDT Sep 21, 2024-6pm CDT Sep 27, 2024
 
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