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

27°F

-3°C

Humidity 59%
Wind Speed NE 6 mph
Barometer 30.34 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 8 Dec 10:45 am CST
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 33. Light and variable wind.

    High: 33 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 26. Southeast wind 5 to 9 mph becoming south after midnight.

    Low: 26 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 51. Southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 51 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. South wind 11 to 16 mph becoming west after midnight. Winds could gust as high as 29 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 37 by 5pm. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 46 °F⇓

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 33. Light and variable wind.
Tonight
Mostly cloudy, with a low around 26. Southeast wind 5 to 9 mph becoming south after midnight.
Tuesday
Mostly sunny, with a high near 51. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 42. South wind 11 to 16 mph becoming west after midnight. Winds could gust as high as 29 mph.
Wednesday
Partly sunny, with a temperature falling to around 37 by 5pm. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 8.
Saturday
Partly sunny and cold, with a high near 20.
Saturday Night
Mostly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 27.
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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:
9:21 am CST Dec 8, 2025
Forecast Valid:
11am CST Dec 8, 2025-6pm CST Dec 14, 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