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

73°F

23°C

Humidity 83%
Wind Speed NA
Barometer 29.98 in
Dewpoint 68°F (20°C)
Visibility 8.00 mi
Last update 3 Aug 8:52 am CDT
Extended Forecast for

Murphysboro IL

  • Today

    Today: Patchy fog before 9am. Otherwise, sunny, with a high near 85. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, sunny, with a high near 87. Calm wind.

    High: 87 °F

    Areas Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

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

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 89 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. Light south southwest wind.

    Low: 70 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 88. Calm wind becoming southwest around 5 mph.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, sunny, with a high near 85. Calm wind becoming north northeast around 5 mph in the afternoon.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 64. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 87. Calm wind.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Sunny, with a high near 90. Calm wind.
Wednesday Night
Mostly clear, with a low around 69. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 70. Light south southwest wind.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Calm wind becoming southwest around 5 mph.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Calm wind.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Light south southwest wind.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Calm wind.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind 3 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Murphysboro IL
 37.77°N 89.37°W
Last Update:
7:01 am CDT Aug 3, 2026
Forecast Valid:
8am CDT Aug 3, 2026-6pm CDT Aug 9, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation