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

71°F

22°C

Humidity 77%
Wind Speed S 16 G 22 mph
Barometer 29.83 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 15 Apr 1:35 am CDT
Extended Forecast for

Maryville IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 70. Southwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 70 °F

    Mostly Cloudy

  • 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 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 55. Chance of precipitation is 80%.

    Low: 55 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 67. Chance of precipitation is 50%.

    High: 67 °F

    Chance
    Showers

  • Saturday Night

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

    Low: 40 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 70. Southwest wind around 11 mph, with gusts as high as 20 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 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 55. Chance of precipitation is 80%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 67. Chance of precipitation is 50%.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 62.
Sunday Night
Clear, with a low around 40.
Monday
Sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 76.
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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:
1:26 am CDT Apr 15, 2026
Forecast Valid:
1am CDT Apr 15, 2026-6pm CDT Apr 21, 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