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.

Thunderstorm Heavy Rain

38°F

3°C

Humidity 97%
Wind Speed E 6 mph
Barometer 30.09 in
Dewpoint 38°F (3°C)
Visibility 1.00 mi
Wind Chill33°F (1°C)
Last update 3 Mar 3:15 am CST
Extended Forecast for

Bethalto IL

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Patchy fog. Low around 37. East wind around 5 mph. Chance of precipitation is 100%.

    Low: 37 °F

    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. Patchy fog between noon and 1pm. High near 55. East wind 5 to 7 mph becoming northeast in the afternoon. Chance of precipitation is 100%.

    High: 55 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Patchy fog between 9pm and 10pm. Low around 47. East wind around 8 mph. Chance of precipitation is 90%.

    Low: 47 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 63. East wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 63 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 53. South wind 5 to 7 mph. Chance of precipitation is 90%.

    Low: 53 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.

    High: 68 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

    Low: 55 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Breezy. Chance of precipitation is 50%.

    High: 78 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 58. Chance of precipitation is 80%.

    Low: 58 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Patchy fog. Low around 37. East wind around 5 mph. Chance of precipitation is 100%.
Tuesday
Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. Patchy fog between noon and 1pm. High near 55. East wind 5 to 7 mph becoming northeast in the afternoon. Chance of precipitation is 100%.
Tuesday Night
Showers and possibly a thunderstorm. Patchy fog between 9pm and 10pm. Low around 47. East wind around 8 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. High near 63. East wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 53. South wind 5 to 7 mph. Chance of precipitation is 90%.
Thursday
Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Breezy. Chance of precipitation is 50%.
Friday Night
A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 58. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 48.
Monday
A 20 percent chance of showers. Sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethalto IL
 38.88°N 90.02°W (Elev. 499 ft)
Last Update:
12:26 am CST Mar 3, 2026
Forecast Valid:
3am CST Mar 3, 2026-6pm CDT Mar 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