National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist Rain

72°F

22°C

Humidity 94%
Wind Speed SE 8 mph
Barometer 29.98 in
Dewpoint 70°F (21°C)
Visibility 4.00 mi
Last update 15 Oct 11:50 am CDT
Extended Forecast for

Maryville IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 81. South wind 9 to 11 mph. Chance of precipitation is 90%.

    High: 81 °F

    Heavy Rain

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 4am. Increasing clouds, with a low around 48. Southwest wind 10 to 18 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 48 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after 4pm. Mostly cloudy through mid morning, then becoming sunny, with a high near 56. Breezy, with a northwest wind 18 to 21 mph, with gusts as high as 29 mph.

    High: 56 °F

    Breezy. Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind 9 to 18 mph.

    Low: 39 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 60. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 81. South wind 9 to 11 mph. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 4am. Increasing clouds, with a low around 48. Southwest wind 10 to 18 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Friday
A 20 percent chance of showers after 4pm. Mostly cloudy through mid morning, then becoming sunny, with a high near 56. Breezy, with a northwest wind 18 to 21 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind 9 to 18 mph.
Saturday
Sunny, with a high near 60. North wind 5 to 7 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 36.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 78.
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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:
11:21 am CDT Oct 15, 2026
Forecast Valid:
12pm CDT Oct 15, 2026-6pm CDT Oct 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