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

37°F

3°C

Humidity 75%
Wind Speed SW 10 mph
Barometer 29.94 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 9 Dec 8:50 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Increasing clouds, with a high near 51. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 51 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A slight chance of rain between midnight and 3am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 45. South wind 14 to 17 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.

    Low: 45 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Increasing clouds, with a temperature falling to around 35 by 5pm. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 38 mph.

    High: 44 °F⇓

    Increasing
    Clouds and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 26 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 40. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 40 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

Detailed Forecast

Today
Increasing clouds, with a high near 51. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.
Tonight
A slight chance of rain between midnight and 3am. Cloudy, then gradually becoming partly cloudy, with a steady temperature around 45. South wind 14 to 17 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.
Wednesday
Increasing clouds, with a temperature falling to around 35 by 5pm. Breezy, with a northwest wind 14 to 24 mph, with gusts as high as 38 mph.
Wednesday Night
Mostly cloudy, with a low around 26. Northwest wind 5 to 10 mph becoming light after midnight.
Thursday
Mostly cloudy, with a high near 40. Light and variable wind becoming south 5 to 7 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 41.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Mostly cloudy, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Partly cloudy, with a low around 13.
Monday
A chance of rain and snow. Partly sunny, with a high near 36. Chance of precipitation is 30%.
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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:
7:52 am CST Dec 9, 2025
Forecast Valid:
8am CST Dec 9, 2025-6pm CST Dec 15, 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