National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

58°F

14°C

Humidity 55%
Wind Speed S 9 mph
Barometer 30.05 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 30 Mar 1:35 am CDT
Extended Forecast for

2 Miles NNE Bethalto IL

  • Overnight

    Overnight: Partly cloudy, with a low around 55. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 81. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 31 mph.

    High: 81 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 63. South wind 9 to 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: A slight chance of rain, then a chance of rain and thunderstorms after 10am. Partly sunny, with a high near 84. Breezy, with a south wind 13 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 56. Southwest wind 9 to 11 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

    Low: 56 °F

    Chance
    T-storms then
    Rain Likely

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.

    High: 73 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 61. Chance of precipitation is 80%.

    Low: 61 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 75. Breezy. Chance of precipitation is 90%.

    High: 75 °F

    Rain and
    Breezy

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.

    Low: 56 °F

    Rain Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 55. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 81. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 31 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 63. South wind 9 to 15 mph, with gusts as high as 25 mph.
Tuesday
A slight chance of rain, then a chance of rain and thunderstorms after 10am. Partly sunny, with a high near 84. Breezy, with a south wind 13 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 56. Southwest wind 9 to 11 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Wednesday
Rain and possibly a thunderstorm. High near 73. Chance of precipitation is 80%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 61. Chance of precipitation is 80%.
Thursday
Rain and possibly a thunderstorm. High near 75. Breezy. Chance of precipitation is 90%.
Thursday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Friday
A chance of rain and thunderstorms. Mostly cloudy, with a high near 77. Chance of precipitation is 50%.
Friday Night
Rain likely. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 68. Breezy. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 40.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Bethalto IL
 38.92°N 90.02°W (Elev. 512 ft)
Last Update:
1:25 am CDT Mar 30, 2026
Forecast Valid:
1am CDT Mar 30, 2026-6pm CDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation