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

54°F

12°C

Humidity 63%
Wind Speed W 5 mph
Barometer 30.12 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 22 Nov 12:50 pm CST
Extended Forecast for

Bethalto IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 56. West wind 5 to 7 mph.

    High: 56 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 41. West wind 3 to 5 mph.

    Low: 41 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, sunny, with a high near 58. Northwest wind around 5 mph becoming calm in the morning.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 40. Calm wind becoming southeast around 6 mph after midnight.

    Low: 40 °F

    Increasing
    Clouds

  • Monday

    Monday: A 50 percent chance of rain after noon. Cloudy, with a high near 56. Southeast wind 6 to 10 mph.

    High: 56 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 48. Chance of precipitation is 90%.

    Low: 48 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 62.

    High: 62 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 56. West wind 5 to 7 mph.
Tonight
Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 41. West wind 3 to 5 mph.
Sunday
Patchy fog before 9am. Otherwise, sunny, with a high near 58. Northwest wind around 5 mph becoming calm in the morning.
Sunday Night
Increasing clouds, with a low around 40. Calm wind becoming southeast around 6 mph after midnight.
Monday
A 50 percent chance of rain after noon. Cloudy, with a high near 56. Southeast wind 6 to 10 mph.
Monday Night
Rain, mainly before midnight. Low around 48. Chance of precipitation is 90%.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Mostly clear, with a low around 26.
Thanksgiving Day
Sunny, with a high near 44.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 44.
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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:
1:10 pm CST Nov 22, 2025
Forecast Valid:
1pm CST Nov 22, 2025-6pm CST Nov 28, 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