National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Partly Cloudy

83°F

28°C

Humidity 38%
Wind Speed Vrbl 5 mph
Barometer 30.13 in (1020.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 23 Jun 3:52 pm CDT
Extended Forecast for

Murphysboro IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 82. North northeast wind around 5 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 2am. Partly cloudy, with a low around 66. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 86 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 69. Light south wind. Chance of precipitation is 90%.

    Low: 69 °F

    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 7am. High near 84. Southwest wind 5 to 9 mph. Chance of precipitation is 80%.

    High: 84 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 72. South southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 72 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 88. South southwest wind 3 to 7 mph.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 82. North northeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 62. Calm wind.
Wednesday
Mostly sunny, with a high near 84. Calm wind becoming south southwest around 6 mph in the afternoon.
Wednesday Night
A slight chance of showers and thunderstorms, then a chance of showers after 2am. Partly cloudy, with a low around 66. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
A chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Thursday Night
Showers and possibly a thunderstorm. Low around 69. Light south wind. Chance of precipitation is 90%.
Friday
Showers, with thunderstorms also possible after 7am. High near 84. Southwest wind 5 to 9 mph. Chance of precipitation is 80%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 72. South southwest wind 5 to 7 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. South southwest wind 3 to 7 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 94. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 75. South southwest wind 6 to 10 mph.
Monday
Sunny, with a high near 96. South southwest wind 6 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Murphysboro IL
 37.77°N 89.34°W
Last Update:
1:16 pm CDT Jun 23, 2026
Forecast Valid:
4pm CDT Jun 23, 2026-6pm CDT Jun 29, 2026
 
Forecast Discussion
 
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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