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.

Fog/Mist

53°F

12°C

Humidity 96%
Wind Speed N 7 mph
Barometer 30.05 in (1017.5 mb)
Dewpoint 52°F (11°C)
Visibility 5.00 mi
Wind Chill51°F (11°C)
Last update 18 Nov 11:52 pm CST
Extended Forecast for

3 Miles SSE Alto Pass IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 61. Light north wind.

    High: 61 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 9am. High near 62. Calm wind becoming south southeast around 6 mph. Chance of precipitation is 90%.

    High: 62 °F

    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 56. Light southwest wind. Chance of precipitation is 90%.

    Low: 56 °F

    Showers

  • Friday

    Friday: Showers. High near 65. East wind 3 to 7 mph. Chance of precipitation is 90%.

    High: 65 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 51. East wind around 6 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 51 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 61. North northwest wind 3 to 7 mph.

    High: 61 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 51. Calm wind.
Wednesday
Mostly cloudy, with a high near 61. Light north wind.
Wednesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 49. Calm wind.
Thursday
Showers, with thunderstorms also possible after 9am. High near 62. Calm wind becoming south southeast around 6 mph. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm. Low around 56. Light southwest wind. Chance of precipitation is 90%.
Friday
Showers. High near 65. East wind 3 to 7 mph. Chance of precipitation is 90%.
Friday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 51. East wind around 6 mph becoming north after midnight. Chance of precipitation is 80%.
Saturday
Partly sunny, with a high near 61. North northwest wind 3 to 7 mph.
Saturday Night
Partly cloudy, with a low around 43. Calm wind.
Sunday
Mostly sunny, with a high near 62. Calm wind becoming west around 5 mph.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 44. Light south wind.
Monday
A chance of showers. Mostly cloudy, with a high near 62. Calm wind becoming south southwest around 6 mph in the morning.
Monday Night
A chance of showers. Mostly cloudy, with a low around 46. East southeast wind 3 to 6 mph.
Tuesday
A chance of showers. Mostly cloudy, with a high near 60. Southeast wind 6 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Alto Pass IL
 37.52°N 89.3°W
Last Update:
9:26 pm CST Nov 18, 2025
Forecast Valid:
12am CST Nov 19, 2025-6pm CST Nov 25, 2025
 
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