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.

Fog/Mist

41°F

5°C

Humidity 89%
Wind Speed NE 9 mph
Barometer 30.18 in (1022.0 mb)
Dewpoint 38°F (3°C)
Visibility 6.00 mi
Wind Chill35°F (2°C)
Last update 2 Mar 2:52 pm CST
Extended Forecast for

Altenburg MO

  • This Afternoon

    This Afternoon: Cloudy, with a high near 43. Northeast wind around 7 mph.

    High: 43 °F

    Cloudy

  • Tonight

    Tonight: Showers likely before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Cloudy, with a low around 40. East northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 40 °F

    Cloudy then
    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 66. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

    High: 66 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 54. South wind around 7 mph. Chance of precipitation is 40%.

    Low: 54 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. South southwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

    High: 73 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. South wind 8 to 10 mph. Chance of precipitation is 70%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 72. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 72 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 59. South wind around 8 mph.

    Low: 59 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 78. South wind 8 to 17 mph, with gusts as high as 26 mph.

    High: 78 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Cloudy, with a high near 43. Northeast wind around 7 mph.
Tonight
Showers likely before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Cloudy, with a low around 40. East northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 66. Light and variable wind becoming south southwest 5 to 10 mph in the morning.
Tuesday Night
A chance of showers, with thunderstorms also possible after 3am. Mostly cloudy, with a low around 54. South wind around 7 mph. Chance of precipitation is 40%.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. South southwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. South wind 8 to 10 mph. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 72. Southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 59. South wind around 8 mph.
Friday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 78. South wind 8 to 17 mph, with gusts as high as 26 mph.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 61. South wind 11 to 13 mph, with gusts as high as 21 mph.
Saturday
Showers and possibly a thunderstorm. Cloudy, with a high near 71. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 50. Southwest wind 5 to 7 mph becoming northwest in the evening.
Sunday
A chance of showers. Mostly cloudy, with a high near 67. South southwest wind 5 to 8 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:
1:16 pm CST Mar 2, 2026
Forecast Valid:
3pm CST Mar 2, 2026-6pm CDT Mar 8, 2026
 
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