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

37°F

3°C

Humidity 79%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 12 Mar 12:35 am CDT
Extended Forecast for

Maryville IL

  • Overnight

    Overnight: Mostly clear, with a low around 31. Northwest wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 31 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 54. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Breezy, with a south wind 13 to 21 mph, with gusts as high as 31 mph.

    Low: 44 °F

    Mostly Clear
    then Partly
    Cloudy and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 60. West wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 60 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36. Northwest wind around 7 mph becoming northeast after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely and possibly a thunderstorm, then rain after 1pm. High near 65. Breezy. Chance of precipitation is 80%.

    High: 65 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around 25. Breezy. Chance of precipitation is 30%.

    Low: 25 °F

    Chance
    Rain/Snow and
    Breezy

Detailed Forecast

Overnight
Mostly clear, with a low around 31. Northwest wind 7 to 10 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 54. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 44. Breezy, with a south wind 13 to 21 mph, with gusts as high as 31 mph.
Friday
Partly sunny, with a high near 60. West wind 11 to 17 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 36. Northwest wind around 7 mph becoming northeast after midnight.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Rain likely and possibly a thunderstorm, then rain after 1pm. High near 65. Breezy. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around 25. Breezy. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 35. Breezy.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Mostly sunny, with a high near 41.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 55.
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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:
10:31 pm CDT Mar 11, 2026
Forecast Valid:
12am CDT Mar 12, 2026-6pm CDT Mar 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