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

28°F

-2°C

Humidity 72%
Wind Speed S 6 mph
Barometer 30.41 in
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 12 Jan 12:35 am CST
Extended Forecast for

Maryville IL

  • Overnight

    Overnight: Clear, with a low around 25. Calm wind becoming south 5 to 7 mph.

    Low: 25 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 51. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36. Southwest wind 6 to 8 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 59. Southwest wind 9 to 15 mph, with gusts as high as 26 mph.

    High: 59 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 38. West wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 43. Breezy.

    High: 43 °F

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19. Blustery.

    Low: 19 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 25. Calm wind becoming south 5 to 7 mph.
Monday
Sunny, with a high near 51. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 36. Southwest wind 6 to 8 mph.
Tuesday
Increasing clouds, with a high near 59. Southwest wind 9 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 38. West wind 9 to 13 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 43. Breezy.
Wednesday Night
Mostly cloudy, with a low around 19. Blustery.
Thursday
Mostly sunny, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 42.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Mostly cloudy, with a high near 32.
Saturday Night
Partly cloudy, with a low around 14.
Sunday
Mostly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Maryville IL
 38.72°N 89.94°W (Elev. 554 ft)
Last Update:
12:31 am CST Jan 12, 2026
Forecast Valid:
12am CST Jan 12, 2026-6pm CST Jan 18, 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