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

45°F

7°C

Humidity 46%
Wind Speed E 5 mph
Barometer 30.38 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 23 Mar 7:50 pm CDT
Extended Forecast for

2 Miles NNE Bethalto IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. East wind 5 to 10 mph, with gusts as high as 26 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 61. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 61 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42. Southeast wind 6 to 9 mph.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75. South wind 6 to 11 mph.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. South wind around 10 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 41. Breezy. Chance of precipitation is 80%.

    Low: 41 °F

    Showers and
    Breezy

  • Friday

    Friday: A chance of showers before 1pm, then a slight chance of rain after 1pm. Mostly cloudy, with a high near 52. Breezy. Chance of precipitation is 40%.

    High: 52 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. East wind 5 to 10 mph, with gusts as high as 26 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 61. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 42. Southeast wind 6 to 9 mph.
Wednesday
Mostly sunny, with a high near 75. South wind 6 to 11 mph.
Wednesday Night
Mostly clear, with a low around 61. South wind around 10 mph.
Thursday
Sunny, with a high near 89.
Thursday Night
Showers and possibly a thunderstorm. Low around 41. Breezy. Chance of precipitation is 80%.
Friday
A chance of showers before 1pm, then a slight chance of rain after 1pm. Mostly cloudy, with a high near 52. Breezy. Chance of precipitation is 40%.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 63.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
A 20 percent chance of rain. Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Bethalto IL
 38.92°N 90.02°W (Elev. 512 ft)
Last Update:
8:36 pm CDT Mar 23, 2026
Forecast Valid:
8pm CDT Mar 23, 2026-6pm CDT Mar 30, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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