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

82°F

28°C

Humidity 30%
Wind Speed S 6 mph
Barometer 29.84 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 21 Mar 1:45 pm CDT
Extended Forecast for

Maryville IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. Light and variable wind becoming south around 6 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 89. Southwest wind 8 to 16 mph becoming north in the afternoon. Winds could gust as high as 24 mph.

    High: 89 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 11 to 21 mph, with gusts as high as 34 mph.

    Low: 38 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Mostly sunny, with a high near 57. Northeast 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: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 87. Light and variable wind becoming south around 6 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 89. Southwest wind 8 to 16 mph becoming north in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a north wind 11 to 21 mph, with gusts as high as 34 mph.
Monday
Mostly sunny, with a high near 57. Northeast wind 8 to 10 mph.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 46.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
A slight chance of rain and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
Thursday
A 20 percent chance of rain and thunderstorms. Sunny, with a high near 83.
Thursday Night
A 40 percent chance of rain and thunderstorms. Partly cloudy, with a low around 45.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 56.
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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:
1:26 pm CDT Mar 21, 2026
Forecast Valid:
1pm CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation