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.

Overcast

75°F

24°C

Humidity 89%
Wind Speed S 7 mph
Barometer 29.93 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 26 Jun 4:50 pm CDT
Extended Forecast for

Maryville IL

Flood Watch June 26, 05:38pm until June 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 26, 05:38pm until June 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • This Afternoon

    High: 80 °F

    Heavy Rain

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 3am. Some of the storms could produce heavy rainfall. Low around 69. Southeast wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 69 °F

    Heavy Rain
    then Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 10am. Partly sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 72. Southeast wind 3 to 6 mph.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 93. South wind 7 to 11 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 80. Southeast wind around 8 mph. Chance of precipitation is 80%.
Tonight
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 3am. Some of the storms could produce heavy rainfall. Low around 69. Southeast wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 80%.
Saturday
A 20 percent chance of showers and thunderstorms before 10am. Partly sunny, with a high near 84. Light and variable wind.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 72. Southeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 93. South wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Clear, with a low around 77.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 77.
Friday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 95.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Maryville IL
 38.72°N 89.97°W (Elev. 558 ft)
Last Update:
2:47 pm CDT Jun 26, 2026
Forecast Valid:
5pm CDT Jun 26, 2026-6pm CDT Jul 3, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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