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.

Fair

70°F

21°C

Humidity 76%
Wind Speed S 10 mph
Barometer 29.82 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 15 Apr 5:15 am CDT
Extended Forecast for

2 Miles WSW Alton IL

  • Overnight

    Overnight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind around 9 mph. Chance of precipitation is 30%.

    Low: 69 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 4pm. Mostly cloudy, with a high near 83. Southwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    High: 83 °F

    Scattered
    Showers then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then scattered showers after 4am. Low around 63. South wind 8 to 11 mph. Chance of precipitation is 90%.

    Low: 63 °F

    Showers

  • Thursday

    Thursday: Scattered showers before 1pm, then scattered showers and thunderstorms between 1pm and 4pm, then scattered showers after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. West wind 7 to 13 mph. Chance of precipitation is 40%.

    High: 83 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60. Southwest wind around 5 mph becoming light and variable in the evening.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 67. Chance of precipitation is 40%.

    High: 67 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 40.

    Low: 40 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 69. Southwest wind around 9 mph. Chance of precipitation is 30%.
Wednesday
Showers and thunderstorms likely, mainly after 4pm. Mostly cloudy, with a high near 83. Southwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Wednesday Night
Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then scattered showers after 4am. Low around 63. South wind 8 to 11 mph. Chance of precipitation is 90%.
Thursday
Scattered showers before 1pm, then scattered showers and thunderstorms between 1pm and 4pm, then scattered showers after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. West wind 7 to 13 mph. Chance of precipitation is 40%.
Thursday Night
Mostly clear, with a low around 60. Southwest wind around 5 mph becoming light and variable in the evening.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.
Friday Night
Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 80%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 67. Chance of precipitation is 40%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 63.
Sunday Night
Clear, with a low around 40.
Monday
Sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Alton IL
 38.88°N 90.19°W (Elev. 407 ft)
Last Update:
1:26 am CDT Apr 15, 2026
Forecast Valid:
5am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation