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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fog/Mist

61°F

16°C

Humidity 97%
Wind Speed Calm
Barometer 30.12 in (1019.9 mb)
Dewpoint 60°F (16°C)
Visibility 5.00 mi
Last update 30 Sep 7:52 am CDT
Extended Forecast for

Altenburg MO

  • Today

    Today: Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. Calm wind becoming east around 6 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 87. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Light southeast wind.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 58. South wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the morning.

    High: 84 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 88. Calm wind becoming east around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 87. Calm wind becoming south southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 61. Light southeast wind.
Friday
Sunny, with a high near 86. Calm wind becoming south around 6 mph in the morning.
Friday Night
Clear, with a low around 58. South wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the morning.
Saturday Night
Clear, with a low around 58. South southeast wind 3 to 5 mph.
Sunday
Sunny, with a high near 83. South southeast wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 60. Southeast wind around 5 mph becoming calm after midnight.
Monday
Mostly sunny, with a high near 84. Calm wind becoming south southeast around 6 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Altenburg MO
 37.62°N 89.57°W
Last Update:
7:15 am CDT Sep 30, 2025
Forecast Valid:
8am CDT Sep 30, 2025-6pm CDT Oct 6, 2025
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation