National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

58°F

14°C

Humidity 97%
Wind Speed NW 3 mph
Barometer 30.12 in (1019.6 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 3 Aug 3:52 am CDT
Extended Forecast for

Alto Pass IL

  • Today

    Today: Sunny, with a high near 81. North northeast wind 3 to 8 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 66. Northeast wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Increasing
    Clouds

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Calm wind becoming east around 5 mph in the afternoon.

    High: 80 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67. Light east southeast wind.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 83. Light east southeast wind. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. Calm wind.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Light east southeast wind.

    High: 86 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 81. North northeast wind 3 to 8 mph.
Tonight
Increasing clouds, with a low around 66. Northeast wind around 5 mph becoming calm in the evening.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67. Light east southeast wind.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 83. Light east southeast wind. Chance of precipitation is 40%.
Tuesday Night
Mostly clear, with a low around 68. Calm wind.
Wednesday
Mostly sunny, with a high near 85. Calm wind.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
Sunny, with a high near 86. Light east southeast wind.
Thursday Night
Mostly clear, with a low around 69. Calm wind.
Friday
Sunny, with a high near 88. Calm wind becoming south southeast around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 71. Light southeast wind.
Saturday
Sunny, with a high near 90. South wind 3 to 7 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alto Pass IL
 37.57°N 89.32°W
Last Update:
2:00 am CDT Aug 3, 2025
Forecast Valid:
4am CDT Aug 3, 2025-6pm CDT Aug 9, 2025
 
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