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.

Overcast and Windy

36°F

2°C

Humidity 78%
Wind Speed W 29 G 38 mph
Barometer 29.59 in
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 15 Mar 11:15 pm CDT
Extended Forecast for

Alton ILSimilar City Names

Wind Advisory March 15, 11:36pm until March 16, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory March 15, 11:36pm until March 16, 12:00pm

    NOW until 12:00pm Mon

    Wind Advisory

  • Tonight

    Low: 21 °F

    Chance
    Rain/Snow and
    Blustery

  • Monday

    Monday: A chance of snow before noon, then scattered flurries between noon and 2pm. Cloudy, with a high near 28. Breezy, with a northwest wind 22 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 30%.

    High: 28 °F

    Chance Snow
    and Breezy
    then
    Scattered
    Flurries and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. Northwest wind 11 to 18 mph, with gusts as high as 26 mph.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34. Northwest wind 6 to 8 mph becoming southwest in the afternoon.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 29. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 29 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

Tonight
A chance of rain and snow before midnight, then a chance of snow between midnight and 4am. Mostly cloudy, with a low around 21. Blustery, with a northwest wind 23 to 25 mph, with gusts as high as 37 mph. Chance of precipitation is 50%.
Monday
A chance of snow before noon, then scattered flurries between noon and 2pm. Cloudy, with a high near 28. Breezy, with a northwest wind 22 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 13. Northwest wind 11 to 18 mph, with gusts as high as 26 mph.
Tuesday
Mostly sunny, with a high near 34. Northwest wind 6 to 8 mph becoming southwest in the afternoon.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 29. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 44.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Mostly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alton ILSimilar City Names
 38.91°N 90.16°W (Elev. 505 ft)
Last Update:
10:56 pm CDT Mar 15, 2026
Forecast Valid:
11pm CDT Mar 15, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation