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

70°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 26 Jun 2:55 am CDT
Extended Forecast for

Bethalto IL

Flood Watch June 26, 03:10am until June 26, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 26, 03:10am until June 26, 07:00pm

    NOW until 7:00pm Fri

    Flood Watch

  • Overnight

    Low: 69 °F

    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm, mainly before 2pm, then showers and thunderstorms likely after 2pm. High near 79. Southeast wind 8 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 79 °F

    Showers then
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 10pm. Partly cloudy, with a low around 66. North wind 3 to 8 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 7pm. Mostly cloudy, with a low around 71. Southeast wind 5 to 7 mph.

    Low: 71 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 69. Southeast wind around 6 mph. Chance of precipitation is 100%.
Friday
Showers and possibly a thunderstorm, mainly before 2pm, then showers and thunderstorms likely after 2pm. High near 79. Southeast wind 8 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Friday Night
Showers and thunderstorms likely, mainly before 10pm. Partly cloudy, with a low around 66. North wind 3 to 8 mph. Chance of precipitation is 60%.
Saturday
A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 83. Light and variable wind.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 7pm. Mostly cloudy, with a low around 71. Southeast wind 5 to 7 mph.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.9°N 90.05°W (Elev. 512 ft)
Last Update:
1:26 am CDT Jun 26, 2026
Forecast Valid:
3am CDT Jun 26, 2026-6pm CDT Jul 2, 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