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 Breezy

49°F

9°C

Humidity 66%
Wind Speed NW 23 G 31 mph
Barometer 29.59 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 10 Dec 5:35 am CST
Extended Forecast for

2 Miles WSW Alton IL

Wind Advisory until December 10, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until December 10, 12:00pm

    NOW until 12:00pm Wed

    Wind Advisory

  • Overnight

    Low: 47 °F

    Chance Rain

  • Wednesday

    Wednesday: A slight chance of rain before 7am, then a chance of sprinkles between 7am and 11am. Mostly cloudy, with a temperature falling to around 35 by 4pm. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 46 mph. Chance of precipitation is 20%.

    High: 41 °F⇓

    Breezy.
    Slight Chance
    Rain then
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24. Northwest wind 6 to 11 mph becoming light after midnight.

    Low: 24 °F

    Mostly Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 38. Light and variable wind becoming southeast 5 to 8 mph in the morning.

    High: 38 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 31. Southeast wind around 8 mph becoming west after midnight.

    Low: 31 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31.

    High: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Overnight
A 30 percent chance of rain. Mostly cloudy, with a steady temperature around 47. West wind around 18 mph, with gusts as high as 29 mph.
Wednesday
A slight chance of rain before 7am, then a chance of sprinkles between 7am and 11am. Mostly cloudy, with a temperature falling to around 35 by 4pm. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 46 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 24. Northwest wind 6 to 11 mph becoming light after midnight.
Thursday
Increasing clouds, with a high near 38. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 31. Southeast wind around 8 mph becoming west after midnight.
Friday
Partly sunny, with a high near 39.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31.
Saturday Night
Mostly cloudy, with a low around 7.
Sunday
Sunny, with a high near 22.
Sunday Night
Mostly clear, with a low around 11.
Monday
Mostly sunny, with a high near 37.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
Partly sunny, with a high near 45.
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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:
4:21 am CST Dec 10, 2025
Forecast Valid:
5am CST Dec 10, 2025-6pm CST Dec 16, 2025
 
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