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

41°F

5°C

Humidity 44%
Wind Speed NE 3 mph
Barometer 30.06 in
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 28 Feb 5:35 am CST
Extended Forecast for

Maryville IL

  • Today

    Today: A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 63. Northeast wind 5 to 8 mph becoming south in the afternoon.

    High: 63 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 30. Southeast wind 6 to 11 mph becoming northwest in the evening. Winds could gust as high as 20 mph.

    Low: 30 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 45. North wind around 11 mph.

    High: 45 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Snow likely. Cloudy, with a low around 32. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 32 °F

    Snow Likely

  • Monday

    Monday: A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 43. East wind around 11 mph. Chance of precipitation is 40%.

    High: 43 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 38. Chance of precipitation is 80%.

    Low: 38 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 58. Chance of precipitation is 90%.

    High: 58 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm. Cloudy, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Rain Likely

Detailed Forecast

Today
A 20 percent chance of rain after 1pm. Mostly sunny, with a high near 63. Northeast wind 5 to 8 mph becoming south in the afternoon.
Tonight
A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 30. Southeast wind 6 to 11 mph becoming northwest in the evening. Winds could gust as high as 20 mph.
Sunday
Increasing clouds, with a high near 45. North wind around 11 mph.
Sunday Night
Snow likely. Cloudy, with a low around 32. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Monday
A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 43. East wind around 11 mph. Chance of precipitation is 40%.
Monday Night
Rain. Low around 38. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm. High near 58. Chance of precipitation is 90%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 50. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 64. Chance of precipitation is 70%.
Wednesday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 68.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 55.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 71. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Maryville IL
 38.72°N 89.97°W (Elev. 558 ft)
Last Update:
3:57 am CST Feb 28, 2026
Forecast Valid:
5am CST Feb 28, 2026-6pm CST Mar 6, 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