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.

Partly Cloudy

79°F

26°C

Humidity 79%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 17 Jun 11:59 am CDT
Extended Forecast for

Altenburg MO

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 87. South southwest wind 3 to 5 mph.

    High: 87 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 73. South wind 6 to 8 mph.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then showers and thunderstorms likely after 10am. Partly sunny, with a high near 88. South southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 88 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a slight chance of showers after 1am. Mostly cloudy, with a low around 68. Southwest wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 68 °F

    T-storms
    Likely then
    Showers
    Likely

  • Juneteenth

    Juneteenth: A 20 percent chance of showers before 1pm. Sunny, with a high near 85. Northwest wind 3 to 6 mph.

    High: 85 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68. Light and variable wind.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming south 5 to 8 mph in the morning.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. South wind around 8 mph.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 93 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 87. South southwest wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around 73. South wind 6 to 8 mph.
Wednesday
A slight chance of showers, then showers and thunderstorms likely after 10am. Partly sunny, with a high near 88. South southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then a slight chance of showers after 1am. Mostly cloudy, with a low around 68. Southwest wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Juneteenth
A 20 percent chance of showers before 1pm. Sunny, with a high near 85. Northwest wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 68. Light and variable wind.
Friday
Sunny, with a high near 89. Calm wind becoming south 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 73. South wind around 8 mph.
Saturday
Sunny, with a high near 93. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 76. South wind 7 to 10 mph.
Sunday
Sunny, with a high near 94. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 75. South wind 6 to 8 mph.
Monday
A slight chance of showers and thunderstorms. Sunny, with a high near 93. South southwest wind 5 to 7 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:
12:16 pm CDT Jun 17, 2025
Forecast Valid:
12pm CDT Jun 17, 2025-6pm CDT Jun 23, 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