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 and Windy

73°F

23°C

Humidity 44%
Wind Speed N 28 G 40 mph
Barometer 29.72 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 22 Mar 4:50 pm CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    T-storms and
    Breezy then
    Clear

  • Monday

    Monday: Increasing clouds, with a high near 56. Northeast wind 8 to 10 mph.

    High: 56 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. East wind around 6 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 64. Southeast wind 6 to 9 mph.

    High: 64 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43. Southeast wind around 6 mph.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Thursday

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

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of rain and thunderstorms, then rain likely after 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Chance
    T-storms then
    Rain Likely

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 17 to 22 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.
Monday
Increasing clouds, with a high near 56. Northeast wind 8 to 10 mph.
Monday Night
Mostly cloudy, with a low around 38. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 64. Southeast wind 6 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 43. Southeast wind around 6 mph.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
A 20 percent chance of rain and thunderstorms after 1pm. Sunny, with a high near 89.
Thursday Night
A chance of rain and thunderstorms, then rain likely after 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain, mainly before 1pm. Partly sunny, with a high near 51.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 66.
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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:
1:25 pm CDT Mar 22, 2026
Forecast Valid:
5pm CDT Mar 22, 2026-6pm CDT Mar 29, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation