National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

18°F

-8°C

Humidity 91%
Wind Speed SE 5 mph
Barometer 30.09 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 3 Dec 12:15 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 18. South wind around 6 mph.

    Low: 18 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 39. South wind 5 to 7 mph becoming northwest in the afternoon.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before 9pm. Cloudy, with a low around 13. North wind 7 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 13 °F

    Snow Likely
    then Slight
    Chance Snow

  • Thursday

    Thursday: Sunny, with a high near 23. North wind 3 to 8 mph.

    High: 23 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 11. Light and variable wind.

    Low: 11 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 18. South wind around 6 mph.
Wednesday
A 50 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 39. South wind 5 to 7 mph becoming northwest in the afternoon.
Wednesday Night
Snow likely, mainly before 9pm. Cloudy, with a low around 13. North wind 7 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
Sunny, with a high near 23. North wind 3 to 8 mph.
Thursday Night
Partly cloudy, with a low around 11. Light and variable wind.
Friday
Mostly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 22.
Saturday
Partly sunny, with a high near 37.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
A slight chance of snow before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 34. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 19.
Monday
Partly sunny, with a high near 34.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
9:56 pm CST Dec 2, 2025
Forecast Valid:
12am CST Dec 3, 2025-6pm CST Dec 9, 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