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.

Rain

64°F

18°C

Humidity 89%
Wind Speed SW 10 mph
Barometer 29.93 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 4 Apr 5:35 am CDT
Extended Forecast for

Bethalto IL

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Steady temperature around 67. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%.

    Low: 67 °F

    Heavy Rain

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 2pm. Some of the storms could produce heavy rainfall. Temperature falling to around 54 by 1pm. West wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    High: 62 °F⇓

    Heavy Rain
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 38. West wind 8 to 16 mph.

    Low: 38 °F

    Gradual
    Clearing

  • Sunday

    Sunday: Sunny, with a high near 57. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39. West wind 3 to 6 mph.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Steady temperature around 67. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%.
Saturday
Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 2pm. Some of the storms could produce heavy rainfall. Temperature falling to around 54 by 1pm. West wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Saturday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 38. West wind 8 to 16 mph.
Sunday
Sunny, with a high near 57. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 39. West wind 3 to 6 mph.
Monday
Sunny, with a high near 59.
Monday Night
Mostly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 74.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 54.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
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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:
4:36 am CDT Apr 4, 2026
Forecast Valid:
5am CDT Apr 4, 2026-6pm CDT Apr 10, 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