National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

61°F

16°C

Humidity 88%
Wind Speed E 9 mph
Barometer 29.96 in
Dewpoint 57°F (14°C)
Visibility 5.00 mi
Last update 25 Dec 3:50 pm CST
Extended Forecast for

Bethalto IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. East wind around 9 mph becoming south after midnight.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 66. Southwest wind 7 to 13 mph becoming northwest in the afternoon.

    High: 66 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. Northwest wind around 6 mph becoming calm in the evening.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 65. Southeast wind 5 to 11 mph.

    High: 65 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain after midnight. Cloudy, with a low around 57. South wind 8 to 11 mph.

    Low: 57 °F

    Cloudy then
    Chance Rain

  • Sunday

    Sunday: Rain likely, then showers and possibly a thunderstorm after 9am. High near 65. Chance of precipitation is 80%.

    High: 65 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 50%.

    Low: 20 °F

    Blustery.
    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 27. Blustery.

    High: 27 °F

    Sunny and
    Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 17.

    Low: 17 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 56. East wind around 9 mph becoming south after midnight.
Friday
Partly sunny, with a high near 66. Southwest wind 7 to 13 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 43. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 65. Southeast wind 5 to 11 mph.
Saturday Night
A 30 percent chance of rain after midnight. Cloudy, with a low around 57. South wind 8 to 11 mph.
Sunday
Rain likely, then showers and possibly a thunderstorm after 9am. High near 65. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before midnight. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 50%.
Monday
Sunny, with a high near 27. Blustery.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Mostly clear, with a low around 24.
New Year's Day
Sunny, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.05°W (Elev. 525 ft)
Last Update:
3:36 pm CST Dec 25, 2025
Forecast Valid:
4pm CST Dec 25, 2025-6pm CST Jan 1, 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