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.

Fair

88°F

31°C

Humidity 46%
Wind Speed S 10 mph
Barometer 29.88 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 1 Oct 5:52 pm CDT
Extended Forecast for

Altenburg MO

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 66. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%.

    Low: 66 °F

    Mostly Cloudy
    then Showers

  • Friday

    Friday: Showers and possibly a thunderstorm before 1pm, then a chance of showers between 1pm and 4pm. High near 69. Light north wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 90%.

    High: 69 °F

    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 54. North northeast wind around 8 mph.

    Low: 54 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 72. Northeast wind around 7 mph.

    High: 72 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 75. Calm wind becoming north 5 to 7 mph in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53. North wind 3 to 5 mph.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72. North northeast wind 5 to 8 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 47. Light northeast wind.

    Low: 47 °F

    Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 66. South wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%.
Friday
Showers and possibly a thunderstorm before 1pm, then a chance of showers between 1pm and 4pm. High near 69. Light north wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 90%.
Friday Night
Mostly cloudy, with a low around 54. North northeast wind around 8 mph.
Saturday
Partly sunny, with a high near 72. Northeast wind around 7 mph.
Saturday Night
Mostly cloudy, with a low around 54. Calm wind.
Sunday
Mostly sunny, with a high near 75. Calm wind becoming north 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 53. North wind 3 to 5 mph.
Monday
Sunny, with a high near 72. North northeast wind 5 to 8 mph.
Monday Night
Clear, with a low around 47. Light northeast wind.
Tuesday
Sunny, with a high near 72. Light east wind.
Tuesday Night
Mostly clear, with a low around 47. Calm wind.
Wednesday
Sunny, with a high near 75. Calm wind.
Wednesday Night
Mostly clear, with a low around 53. Calm wind.
Thursday
Sunny, with a high near 78. Calm wind.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altenburg MO
 37.62°N 89.57°W
Last Update:
5:31 pm CDT Oct 1, 2026
Forecast Valid:
6pm CDT Oct 1, 2026-6pm CDT Oct 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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