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.

Partly Cloudy

79°F

26°C

Humidity 51%
Wind Speed Vrbl 5 mph
Barometer 30.17 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 23 Jun 3:50 pm CDT
Extended Forecast for

Marine IL

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Light and variable wind.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 85. Light south wind. Chance of precipitation is 70%.

    High: 85 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms. Low around 67. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 67 °F

    T-storms

  • Friday

    Friday: Showers and thunderstorms. High near 82. Chance of precipitation is 80%.

    High: 82 °F

    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.

    Low: 69 °F

    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 88.

    High: 88 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Low: 72 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 61. Light and variable wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Light and variable wind becoming south 5 to 7 mph in the morning.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 85. Light south wind. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms. Low around 67. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.
Friday
Showers and thunderstorms. High near 82. Chance of precipitation is 80%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 88.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 94.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marine IL
 38.78°N 89.77°W (Elev. 512 ft)
Last Update:
9:46 am CDT Jun 23, 2026
Forecast Valid:
4pm CDT Jun 23, 2026-6pm CDT Jun 30, 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