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

28°F

-2°C

Humidity 59%
Wind Speed SE 14 mph
Barometer 30.23 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 8 Feb 8:45 am CST
Extended Forecast for

Bethalto IL

  • Today

    Today: Mostly sunny, with a high near 43. Southeast wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 43 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 28. East wind 5 to 9 mph becoming light after midnight.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 51. Calm wind becoming south around 6 mph in the afternoon.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38. South wind around 8 mph becoming southwest after midnight.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. West wind 5 to 9 mph becoming north in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 43. Southeast wind 9 to 14 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 28. East wind 5 to 9 mph becoming light after midnight.
Monday
Mostly sunny, with a high near 51. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 38. South wind around 8 mph becoming southwest after midnight.
Tuesday
Mostly sunny, with a high near 57. West wind 5 to 9 mph becoming north in the afternoon.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
A 30 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 45.
Thursday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 48.
Friday Night
A 30 percent chance of rain. Partly cloudy, with a low around 30.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.02°W (Elev. 499 ft)
Last Update:
8:46 am CST Feb 8, 2026
Forecast Valid:
9am CST Feb 8, 2026-6pm CST Feb 14, 2026
 
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