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

39°F

4°C

Humidity 75%
Wind Speed Vrbl 3 mph
Barometer 29.99 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 6 Dec 10:50 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Partly sunny, with a high near 42. Calm wind becoming east 5 to 7 mph in the afternoon.

    High: 42 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 11pm. Cloudy, with a low around 33. East wind around 7 mph becoming south after midnight.

    Low: 33 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Mostly cloudy, with a temperature rising to near 38 by noon, then falling to around 30 during the remainder of the day. South wind 5 to 13 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 38 °F⇓

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16. North wind 5 to 10 mph.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32. North wind around 5 mph becoming light and variable in the afternoon.

    High: 32 °F

    Mostly Sunny

  • Monday Night

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

    Low: 22 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 42. Calm wind becoming east 5 to 7 mph in the afternoon.
Tonight
A 20 percent chance of rain after 11pm. Cloudy, with a low around 33. East wind around 7 mph becoming south after midnight.
Sunday
A 20 percent chance of rain before noon. Mostly cloudy, with a temperature rising to near 38 by noon, then falling to around 30 during the remainder of the day. South wind 5 to 13 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 16. North wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 32. North wind around 5 mph becoming light and variable in the afternoon.
Monday Night
Partly cloudy, with a low around 22.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
A slight chance of rain and snow. Partly sunny, with a high near 37. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 28.
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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:
9:31 am CST Dec 6, 2025
Forecast Valid:
11am CST Dec 6, 2025-6pm CST Dec 12, 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