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.

Fair with Haze

64°F

18°C

Humidity 84%
Wind Speed Calm
Barometer 30.26 in (1024.6 mb)
Dewpoint 59°F (15°C)
Visibility 5.00 mi
Last update 2 Aug 7:52 am CDT
Extended Forecast for

Altenburg MO

  • Today

    Today: Sunny, with a high near 81. Northeast wind 7 to 10 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. North northeast wind 5 to 7 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83. North northeast wind 5 to 7 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65. North northeast wind around 6 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Light northeast wind.

    High: 82 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67. Light east wind.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Light east southeast wind.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Light east southeast wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Light east wind.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 81. Northeast wind 7 to 10 mph.
Tonight
Mostly clear, with a low around 59. North northeast wind 5 to 7 mph.
Sunday
Sunny, with a high near 83. North northeast wind 5 to 7 mph.
Sunday Night
Partly cloudy, with a low around 65. North northeast wind around 6 mph becoming calm in the evening.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Light northeast wind.
Monday Night
Partly cloudy, with a low around 67. Light east wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Light east southeast wind.
Tuesday Night
Mostly clear, with a low around 68. Light east southeast wind.
Wednesday
Sunny, with a high near 87. Light east wind.
Wednesday Night
Mostly clear, with a low around 69. Light east southeast wind.
Thursday
Sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 71. Light south southeast wind.
Friday
Sunny, with a high near 92. Calm wind becoming south 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:
6:32 am CDT Aug 2, 2025
Forecast Valid:
8am CDT Aug 2, 2025-6pm CDT Aug 8, 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