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.

Fair

59°F

15°C

Humidity 53%
Wind Speed S 8 mph
Barometer 30.05 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 30 Mar 12:35 am CDT
Extended Forecast for

Maryville IL

  • Overnight

    Overnight: Mostly clear, with a low around 57. South wind around 11 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 82. Southwest wind 13 to 18 mph, with gusts as high as 26 mph.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 24 mph.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain, then a chance of rain and thunderstorms after 1pm. Mostly sunny, with a high near 85. Breezy, with a southwest wind 14 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.

    High: 85 °F

    Chance Rain
    and Breezy

  • Tuesday Night

    Tuesday Night: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 57. Southwest wind 10 to 14 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%.

    Low: 57 °F

    Chance Rain
    then Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.

    High: 68 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 54. Chance of precipitation is 90%.

    Low: 54 °F

    Rain

  • Thursday

    Thursday: Rain. High near 66. Chance of precipitation is 80%.

    High: 66 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

    Low: 49 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 57. South wind around 11 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 82. Southwest wind 13 to 18 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 24 mph.
Tuesday
A slight chance of rain, then a chance of rain and thunderstorms after 1pm. Mostly sunny, with a high near 85. Breezy, with a southwest wind 14 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1am. Low around 57. Southwest wind 10 to 14 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.
Wednesday Night
Rain and possibly a thunderstorm. Low around 54. Chance of precipitation is 90%.
Thursday
Rain. High near 66. Chance of precipitation is 80%.
Thursday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 73.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 57.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Saturday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 61.
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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:
10:41 pm CDT Mar 29, 2026
Forecast Valid:
12am CDT Mar 30, 2026-6pm CDT Apr 5, 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