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.

Fair

75°F

24°C

Humidity 71%
Wind Speed S 10 mph
Barometer 29.91 in (1012.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 16 May 10:52 pm CDT
Extended Forecast for

Murphysboro IL

  • Tonight

    Tonight: Partly cloudy, with a low around 68. South wind around 7 mph.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. South wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 70. South wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 70 °F

    Increasing
    Clouds

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. South wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 72. South wind around 14 mph, with gusts as high as 23 mph.

    Low: 72 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. South wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 64. South southwest wind 5 to 11 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.

    Low: 64 °F

    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 75. North wind 7 to 9 mph.

    High: 75 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 55. North wind 6 to 10 mph.

    Low: 55 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 68. South wind around 7 mph.
Sunday
Sunny, with a high near 89. South wind 8 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Increasing clouds, with a low around 70. South wind 11 to 13 mph, with gusts as high as 22 mph.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. South wind 14 to 17 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 72. South wind around 14 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. South wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 64. South southwest wind 5 to 11 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
Wednesday
A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 75. North wind 7 to 9 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 55. North wind 6 to 10 mph.
Thursday
A slight chance of showers. Partly sunny, with a high near 73. North northeast wind around 9 mph.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 56. Northeast wind 5 to 9 mph.
Friday
A slight chance of showers. Partly sunny, with a high near 77. Northeast wind around 7 mph.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 59. Northeast wind 5 to 7 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. East northeast wind 3 to 6 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:
9:11 pm CDT May 16, 2026
Forecast Valid:
11pm CDT May 16, 2026-6pm CDT May 23, 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