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

27°F

-3°C

Humidity 70%
Wind Speed Calm
Barometer 30.37 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 12 Jan 3:35 am CST
Extended Forecast for

Maryville IL

  • Overnight

    Overnight: Clear, with a low around 26. Calm wind becoming south around 5 mph.

    Low: 26 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 53. Southwest wind 6 to 10 mph.

    High: 53 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35. Southwest wind 6 to 8 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 60. West wind 9 to 15 mph, with gusts as high as 26 mph.

    High: 60 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 39. West wind 8 to 11 mph.

    Low: 39 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers after noon. Mostly cloudy, with a temperature falling to around 32 by 5pm. Breezy.

    High: 42 °F⇓

    Mostly Cloudy
    then Slight
    Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 26. Calm wind becoming south around 5 mph.
Monday
Sunny, with a high near 53. Southwest wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 35. Southwest wind 6 to 8 mph.
Tuesday
Increasing clouds, with a high near 60. West wind 9 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 39. West wind 8 to 11 mph.
Wednesday
A 20 percent chance of showers after noon. Mostly cloudy, with a temperature falling to around 32 by 5pm. Breezy.
Wednesday Night
Partly cloudy, with a low around 18.
Thursday
Mostly sunny, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 25.
Friday
A 20 percent chance of snow showers after noon. Partly sunny, with a high near 42.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Mostly cloudy, with a high near 29.
Saturday Night
Partly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 29.
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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:
3:41 am CST Jan 12, 2026
Forecast Valid:
3am 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