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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Murphysboro IL

Extreme Heat Warning August 15, 01:58am until August 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 15, 01:58am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind around 6 mph.

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 76. South southwest wind 3 to 6 mph.

    Low: 76 °F

    Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 98. Heat index values as high as 111. West wind around 6 mph.

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 73. Light north northwest wind. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 88. North wind 3 to 7 mph.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. Light north wind.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 90. Calm wind.

    High: 90 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 75. Calm wind becoming south southwest around 5 mph.
Saturday
Sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind around 6 mph.
Saturday Night
Clear, with a low around 76. South southwest wind 3 to 6 mph.
Sunday
Mostly sunny and hot, with a high near 98. Heat index values as high as 111. West wind around 6 mph.
Sunday Night
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Mostly cloudy, with a low around 73. Light north northwest wind. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 88. North wind 3 to 7 mph.
Monday Night
Partly cloudy, with a low around 68. Light north wind.
Tuesday
Sunny, with a high near 90. Calm wind.
Tuesday Night
Mostly clear, with a low around 72. Calm wind becoming south 5 to 7 mph after midnight.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. South southwest wind 7 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. North wind 6 to 8 mph.
Thursday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 85. North northeast wind 5 to 7 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Northeast wind 3 to 6 mph.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. North wind 3 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Murphysboro IL
 37.77°N 89.34°W
Last Update:
1:26 am CDT Aug 15, 2026
Forecast Valid:
1am CDT Aug 15, 2026-6pm CDT Aug 21, 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