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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Overcast

66°F

19°C

Humidity 90%
Wind Speed S 13 mph
Barometer 29.91 in (1012.7 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 9 Mar 11:52 pm CDT
Extended Forecast for

Alto Pass IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph, with gusts as high as 22 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 77. South southwest wind 9 to 15 mph, with gusts as high as 25 mph.

    High: 77 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly after midnight. Cloudy, with a low around 65. South southwest wind 14 to 17 mph, with gusts as high as 28 mph.

    Low: 65 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 4pm, then showers likely. High near 71. South southwest wind 14 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly before 7pm. Mostly cloudy, with a low around 35. Breezy, with a north wind 10 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

    Low: 35 °F

    Showers
    Likely and
    Breezy then
    Slight Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 53. North wind around 7 mph becoming west in the afternoon.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. South wind 6 to 15 mph, with gusts as high as 24 mph.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 64. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 64 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43. Southwest wind around 6 mph becoming northeast in the evening.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph, with gusts as high as 22 mph.
Tuesday
Mostly cloudy, with a high near 77. South southwest wind 9 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly after midnight. Cloudy, with a low around 65. South southwest wind 14 to 17 mph, with gusts as high as 28 mph.
Wednesday
Showers and possibly a thunderstorm before 4pm, then showers likely. High near 71. South southwest wind 14 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely, mainly before 7pm. Mostly cloudy, with a low around 35. Breezy, with a north wind 10 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Thursday
Sunny, with a high near 53. North wind around 7 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 42. South wind 6 to 15 mph, with gusts as high as 24 mph.
Friday
Partly sunny, with a high near 64. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 43. Southwest wind around 6 mph becoming northeast in the evening.
Saturday
Sunny, with a high near 69. East southeast wind 7 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Mostly clear, with a low around 53. South wind 10 to 14 mph, with gusts as high as 23 mph.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 67. South southwest wind 15 to 17 mph becoming west northwest in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A chance of rain and snow showers. Partly cloudy, with a low around 32. North northwest wind 14 to 17 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 44. North northwest wind 10 to 13 mph, with gusts as high as 21 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alto Pass IL
 37.57°N 89.32°W
Last Update:
12:01 am CDT Mar 10, 2026
Forecast Valid:
12am CDT Mar 10, 2026-6pm CDT Mar 16, 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