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

72°F

22°C

Humidity 61%
Wind Speed SW 9 mph
Barometer 29.68 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 Mar 8:50 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Partly sunny, with a high near 89. Southwest wind 8 to 17 mph becoming north in the afternoon.

    High: 89 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. Breezy, with a north wind 18 to 23 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 37 mph.

    Low: 36 °F

    Slight Chance
    T-storms and
    Breezy then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 56. Northeast wind 8 to 10 mph.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39. East wind around 6 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. Southeast wind 5 to 8 mph.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.

    Low: 60 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89.

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 89. Southwest wind 8 to 17 mph becoming north in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. Breezy, with a north wind 18 to 23 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 37 mph.
Monday
Mostly sunny, with a high near 56. Northeast wind 8 to 10 mph.
Monday Night
Mostly cloudy, with a low around 39. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 66. Southeast wind 5 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 46.
Wednesday
Partly sunny, with a high near 77.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 53.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 33.
Saturday
Mostly sunny, with a high near 58.
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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:
8:26 am CDT Mar 22, 2026
Forecast Valid:
9am CDT Mar 22, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation