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.

Rain

63°F

17°C

Humidity 94%
Wind Speed W 9 mph
Barometer 29.91 in
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Last update 4 Apr 6:45 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 1pm. Some of the storms could produce heavy rainfall. Temperature falling to around 54 by noon. West wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    High: 62 °F⇓

    Heavy Rain
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 39. West wind 8 to 15 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 59. Northwest wind 7 to 13 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40. West wind 3 to 6 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 61. Northwest wind 6 to 11 mph.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 1pm. Some of the storms could produce heavy rainfall. Temperature falling to around 54 by noon. West wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 39. West wind 8 to 15 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 59. Northwest wind 7 to 13 mph.
Sunday Night
Clear, with a low around 40. West wind 3 to 6 mph.
Monday
Sunny, with a high near 61. Northwest wind 6 to 11 mph.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 36.
Tuesday
Partly sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 55.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
4:36 am CDT Apr 4, 2026
Forecast Valid:
6am CDT Apr 4, 2026-6pm CDT Apr 10, 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