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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Mostly Cloudy

69°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 30.10 in (1018.8 mb)
Dewpoint 68°F (20°C)
Visibility 8.00 mi
Last update 5 Aug 1:52 am CDT
Extended Forecast for

Altenburg MO

  • Overnight

    Overnight: Patchy fog after 3am. Otherwise, partly cloudy, with a steady temperature around 68. Calm wind.

    Low: 68 °F

    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind.

    High: 86 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy dense fog before 8am. Otherwise, sunny, with a high near 89. Calm wind.

    High: 89 °F

    Patchy Dense
    Fog then
    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 91. Light southeast wind.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 70. Light southeast wind.

    Low: 70 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 91. Calm wind becoming south around 6 mph in the afternoon.

    High: 91 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 71. Southeast wind 3 to 5 mph.

    Low: 71 °F

    Clear

Detailed Forecast

Overnight
Patchy fog after 3am. Otherwise, partly cloudy, with a steady temperature around 68. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind.
Tuesday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 67. Calm wind.
Wednesday
Patchy dense fog before 8am. Otherwise, sunny, with a high near 89. Calm wind.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
Sunny, with a high near 91. Light southeast wind.
Thursday Night
Clear, with a low around 70. Light southeast wind.
Friday
Sunny, with a high near 91. Calm wind becoming south around 6 mph in the afternoon.
Friday Night
Clear, with a low around 71. Southeast wind 3 to 5 mph.
Saturday
Sunny, with a high near 91. South wind 3 to 7 mph.
Saturday Night
Mostly clear, with a low around 72. South southeast wind 3 to 6 mph.
Sunday
Sunny, with a high near 91. South wind 3 to 6 mph.
Sunday Night
Mostly clear, with a low around 73. South wind 3 to 5 mph.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. South southwest wind 3 to 6 mph.
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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:
1:31 am CDT Aug 5, 2025
Forecast Valid:
2am CDT Aug 5, 2025-6pm CDT Aug 11, 2025
 
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Additional Resources

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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