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

91°F

33°C

Humidity 30%
Wind Speed NW 10 mph
Barometer 29.61 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 22 Mar 2:50 pm CDT
Extended Forecast for

Maryville IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 90. Northwest wind 11 to 14 mph.

    High: 90 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 19 to 24 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 34 mph.

    Low: 36 °F

    Slight Chance
    T-storms and
    Breezy then
    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 55. Northeast wind around 10 mph.

    High: 55 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. East wind around 6 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62. Southeast wind 6 to 9 mph.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 90. Northwest wind 11 to 14 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 19 to 24 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 34 mph.
Monday
Increasing clouds, with a high near 55. Northeast wind around 10 mph.
Monday Night
Mostly cloudy, with a low around 38. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 62. Southeast wind 6 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Sunny, with a high near 87.
Thursday Night
A chance of rain and thunderstorms, then rain likely after 1am. Partly cloudy, with a low around 42. Chance of precipitation is 60%.
Friday
A 40 percent chance of rain. Partly sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Partly sunny, with a high near 64.
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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:
1:25 pm CDT Mar 22, 2026
Forecast Valid:
3pm CDT Mar 22, 2026-6pm CDT Mar 29, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation