Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

81°F

27°C

Humidity 82%
Wind Speed SE 3 mph
Barometer 29.98 in (1014.9 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 Aug 8:52 pm CDT
Extended Forecast for

Oraville IL

Heat Advisory August 18, 09:47pm until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 09:47pm until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Tonight

    Low: 75 °F

    Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 4pm.  Sunny and hot, with a high near 97. Heat index values as high as 109. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 72. Light north northwest wind.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms.  Partly sunny, with a high near 89. Light north wind becoming north northeast 5 to 9 mph in the morning.

    High: 89 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. North northeast wind 6 to 8 mph.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 89. North northeast wind 6 to 9 mph.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. North northeast wind 5 to 7 mph becoming calm  in the evening.

    Low: 67 °F

    Mostly Clear

  • Friday

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

    High: 91 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 75. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 97. Heat index values as high as 109. Calm wind becoming west northwest around 5 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Light north northwest wind.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Light north wind becoming north northeast 5 to 9 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 68. North northeast wind 6 to 8 mph.
Thursday
Mostly sunny, with a high near 89. North northeast wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 67. North northeast wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 91. Calm wind becoming north around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 67. North northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 90. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 62. North wind 3 to 6 mph.
Sunday
Sunny, with a high near 85. Light north wind becoming north northwest 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 58. North wind 3 to 7 mph.
Monday
Mostly sunny, with a high near 81. Calm wind becoming north northwest 5 to 7 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Oraville IL
 37.91°N 89.42°W
8:15 pm CDT Aug 18, 2025
9pm CDT Aug 18, 2025-6pm CDT Aug 25, 2025
 
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Additional Resources

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