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 44%
Wind Speed SE 7 mph
Barometer 29.89 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 21 Mar 11:45 am CDT
Extended Forecast for

Maryville IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. Southeast wind around 7 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 64. South wind 7 to 9 mph, with gusts as high as 22 mph.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 88. Southwest wind 9 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 88 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Breezy, with a north wind 13 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    Low: 39 °F

    Slight Chance
    T-storms and
    Breezy then
    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 57. North wind 8 to 10 mph.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 71.

    High: 71 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 87. Southeast wind around 7 mph.
Tonight
Mostly clear, with a low around 64. South wind 7 to 9 mph, with gusts as high as 22 mph.
Sunday
Increasing clouds, with a high near 88. Southwest wind 9 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Breezy, with a north wind 13 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 57. North wind 8 to 10 mph.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 44.
Wednesday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 71.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 80.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 46.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 57.
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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:
9:41 am CDT Mar 21, 2026
Forecast Valid:
12pm CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation