Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

41°F

5°C

Humidity 83%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 19 Mar 2:35 am CDT
Extended Forecast for

2 Miles NNE Bethalto IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 74. Calm wind becoming south around 6 mph in the afternoon.

    High: 74 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. Southeast wind 3 to 5 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80. Light southwest wind becoming west 6 to 11 mph in the morning.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. West wind around 6 mph becoming light and variable  after midnight.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 41. Calm wind.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 74. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 48. Southeast wind 3 to 5 mph.
Friday
Sunny, with a high near 80. Light southwest wind becoming west 6 to 11 mph in the morning.
Friday Night
Partly cloudy, with a low around 50. West wind around 6 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 58.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Mostly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Bethalto IL
 38.92°N 90.02°W (Elev. 512 ft)
1:30 am CDT Mar 19, 2026
2am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database