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.

Overcast

61°F

16°C

Humidity 86%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 3 Apr 3:55 am CDT
Extended Forecast for

Bethalto IL

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Light east wind.

    Low: 59 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Partly sunny, with a high near 80. Southeast wind 5 to 10 mph becoming south 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 80 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 58. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%.

    Low: 58 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers, mainly before 1pm. Temperature falling to around 56 by 5pm. West wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 61 °F⇓

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38. Northwest wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Light east wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Partly sunny, with a high near 80. Southeast wind 5 to 10 mph becoming south 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 58. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%.
Saturday
Showers, mainly before 1pm. Temperature falling to around 56 by 5pm. West wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Saturday Night
Partly cloudy, with a low around 38. Northwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 58.
Sunday Night
Clear, with a low around 39.
Monday
Sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 33.
Tuesday
Mostly sunny, with a high near 54.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 75.
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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:
4:51 am CDT Apr 3, 2026
Forecast Valid:
5am CDT Apr 3, 2026-6pm CDT Apr 9, 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