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.

Overcast

80°F

27°C

Humidity 67%
Wind Speed SW 7 mph
Barometer 29.92 in (1012.7 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 15 Oct 6:52 pm CDT
Extended Forecast for

Altenburg MO

  • Tonight

    Tonight: Showers and thunderstorms likely before 3am, then a chance of showers. Mostly cloudy, with a low around 48. Southwest wind 5 to 10 mph becoming northwest 11 to 16 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%.

    Low: 48 °F

    Showers
    Likely

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 58. Northwest wind 15 to 18 mph, with gusts as high as 29 mph.

    High: 58 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39. North northwest wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 59. North wind 6 to 8 mph.

    High: 59 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 66. Light south southeast wind.

    High: 66 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70. Calm wind becoming south around 5 mph.

    High: 70 °F

    Sunny

  • Monday Night

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

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely before 3am, then a chance of showers. Mostly cloudy, with a low around 48. Southwest wind 5 to 10 mph becoming northwest 11 to 16 mph after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 58. Northwest wind 15 to 18 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, with a low around 39. North northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 59. North wind 6 to 8 mph.
Saturday Night
Clear, with a low around 35. Calm wind.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 66. Light south southeast wind.
Sunday Night
Mostly clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 70. Calm wind becoming south around 5 mph.
Monday Night
Partly cloudy, with a low around 43. Calm wind.
Tuesday
Mostly sunny, with a high near 75. Calm wind.
Tuesday Night
Mostly clear, with a low around 46. Calm wind.
Wednesday
Sunny, with a high near 78. Calm wind.
Wednesday Night
Clear, with a low around 47. Calm wind.
Thursday
Sunny, with a high near 79. Light south southeast wind.
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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:
6:31 pm CDT Oct 15, 2026
Forecast Valid:
7pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation