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

72°F

22°C

Humidity 76%
Wind Speed S 15 mph
Barometer 29.85 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 15 Apr 12:35 am CDT
Extended Forecast for

Maryville IL

  • Overnight

    Overnight: Increasing clouds, with a low around 70. Southwest wind around 11 mph, with gusts as high as 21 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

Overnight
Increasing clouds, with a low around 70. Southwest wind around 11 mph, with gusts as high as 21 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
Tiles ©ESRI

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:
12am 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation