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.

Mostly Cloudy

35°F

2°C

Humidity 75%
Wind Speed E 5 mph
Barometer 30.22 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 13 Feb 12:55 am CST
Extended Forecast for

Bethalto IL

  • Overnight

    Overnight: Mostly clear, with a low around 32. Southeast wind around 6 mph.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 59. South wind 6 to 9 mph.

    High: 59 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 37. Southeast wind around 5 mph becoming calm in the evening.

    Low: 37 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain, mainly after noon. High near 51. Calm wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 80%.

    High: 51 °F

    Chance Rain
    then Rain

  • Saturday Night

    Saturday Night: Rain. Low around 43. East wind around 8 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Rain then
    Rain Likely

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Partly sunny, with a high near 57.

    High: 57 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 32. Southeast wind around 6 mph.
Friday
Sunny, with a high near 59. South wind 6 to 9 mph.
Friday Night
Increasing clouds, with a low around 37. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Rain, mainly after noon. High near 51. Calm wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 80%.
Saturday Night
Rain. Low around 43. East wind around 8 mph. Chance of precipitation is 90%.
Sunday
A 20 percent chance of rain before noon. Partly sunny, with a high near 57.
Sunday Night
Mostly clear, with a low around 37.
Washington's Birthday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Mostly cloudy, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
Partly sunny, with a high near 70.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 46.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 63.
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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:
12:26 am CST Feb 13, 2026
Forecast Valid:
1am CST Feb 13, 2026-6pm CST Feb 19, 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