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

73°F

23°C

Humidity 72%
Wind Speed S 16 G 24 mph
Barometer 29.87 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 14 Apr 11:15 pm CDT
Extended Forecast for

Maryville IL

  • Tonight

    Tonight: Increasing clouds, with a low around 70. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 70 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 81. Southwest wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    High: 81 °F

    Isolated
    T-storms then
    Heavy Rain

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then scattered showers and thunderstorms after 4am. Low around 64. South wind around 11 mph. Chance of precipitation is 90%.

    Low: 64 °F

    Showers

  • Thursday

    Thursday: Scattered showers between 7am and 1pm, then scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 82 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60. South wind around 6 mph.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers 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
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 42.

    Low: 42 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 70. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.
Wednesday
Showers and thunderstorms likely, mainly after 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 81. Southwest wind 10 to 15 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 and thunderstorms after 4am. Low around 64. South wind around 11 mph. Chance of precipitation is 90%.
Thursday
Scattered showers between 7am and 1pm, then scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Thursday Night
Mostly clear, with a low around 60. South wind around 6 mph.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 42.
Sunday
Sunny, with a high near 61.
Sunday Night
Clear, with a low around 40.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Maryville IL
 38.72°N 89.97°W (Elev. 558 ft)
Last Update:
10:31 pm CDT Apr 14, 2026
Forecast Valid:
11pm CDT Apr 14, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation