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.

Fair

43°F

6°C

Humidity 45%
Wind Speed NW 7 mph
Barometer 30.60 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 27 Mar 10:55 pm CDT
Extended Forecast for

Bethalto IL

Freeze Warning March 28, 01:00am until March 28, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Tonight

    Tonight: Widespread frost after 4am. Otherwise, mostly clear, with a low around 30. North wind 6 to 9 mph.

    Low: 30 °F

    Frost

  • Saturday

    Saturday: Widespread frost before 9am. Otherwise, sunny, with a high near 54. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 54 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. South wind around 10 mph.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 68. South wind 9 to 15 mph, with gusts as high as 22 mph.

    High: 68 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55. South wind 10 to 13 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain, then a chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 83. Breezy. Chance of precipitation is 30%.

    High: 83 °F

    Chance Rain
    and Breezy

  • Tuesday Night

    Tuesday Night: Rain likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Rain Likely

Detailed Forecast

Tonight
Widespread frost after 4am. Otherwise, mostly clear, with a low around 30. North wind 6 to 9 mph.
Saturday
Widespread frost before 9am. Otherwise, sunny, with a high near 54. Light and variable wind becoming south 5 to 10 mph in the morning.
Saturday Night
Partly cloudy, with a low around 39. South wind around 10 mph.
Sunday
Partly sunny, with a high near 68. South wind 9 to 15 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 55. South wind 10 to 13 mph.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
A slight chance of rain, then a chance of rain and thunderstorms after 1pm. Partly sunny, with a high near 83. Breezy. Chance of precipitation is 30%.
Tuesday Night
Rain likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.
Wednesday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 58.
Wednesday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Thursday
Rain and thunderstorms likely. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 46.
Friday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 71.
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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:
9:26 pm CDT Mar 27, 2026
Forecast Valid:
11pm CDT Mar 27, 2026-6pm CDT Apr 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation