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.

Partly Cloudy and Breezy

70°F

21°C

Humidity 64%
Wind Speed S 24 G 32 mph
Barometer 29.88 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 31 Mar 8:50 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Today

    Today: A 30 percent chance of rain and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 86. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 30 mph.

    High: 86 °F

    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: Rain and thunderstorms before 4am, then a chance of rain. Low around 59. Southwest wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 80%.

    Low: 59 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 4pm, then rain likely. High near 73. East wind 6 to 11 mph. Chance of precipitation is 90%.

    High: 73 °F

    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 64. Southeast wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Low: 64 °F

    Chance Rain
    then Chance
    T-storms

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 77. Breezy, with a south wind 14 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 90%.

    High: 77 °F

    Breezy. Rain
    Likely then
    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Rain Likely

  • Friday

    Friday: A chance of rain, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Chance Rain
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Chance
    T-storms then
    Rain Likely

  • Saturday

    Saturday: Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Breezy. Chance of precipitation is 70%.

    High: 69 °F

    Rain Likely
    and Breezy

Detailed Forecast

Today
A 30 percent chance of rain and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 86. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 30 mph.
Tonight
Rain and thunderstorms before 4am, then a chance of rain. Low around 59. Southwest wind 5 to 10 mph becoming northwest after midnight. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm before 4pm, then rain likely. High near 73. East wind 6 to 11 mph. Chance of precipitation is 90%.
Wednesday Night
A chance of rain, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 64. Southeast wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Thursday
Rain and possibly a thunderstorm. High near 77. Breezy, with a south wind 14 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 90%.
Thursday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Friday
A chance of rain, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Friday Night
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. Breezy. Chance of precipitation is 70%.
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 58.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
5:51 am CDT Mar 31, 2026
Forecast Valid:
8am CDT Mar 31, 2026-6pm CDT Apr 6, 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