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

58°F

14°C

Humidity 87%
Wind Speed S 10 mph
Barometer 29.68 in (1005.1 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Feb 7:52 pm CST
Extended Forecast for

Murphysboro IL

  • Tonight

    Tonight: Partly cloudy, with a low around 55. South wind around 7 mph.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 70. South wind 7 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 41. West southwest wind 10 to 13 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55. West wind 5 to 13 mph, with gusts as high as 20 mph.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 33. North wind 3 to 6 mph.

    Low: 33 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 48. North wind 6 to 9 mph.

    High: 48 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 41. Northwest wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 41 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 21. North northwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 21 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 55. South wind around 7 mph.
Thursday
Showers and thunderstorms likely, mainly before 2pm. Mostly cloudy, with a high near 70. South wind 7 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.
Thursday Night
Mostly clear, with a low around 41. West southwest wind 10 to 13 mph, with gusts as high as 24 mph.
Friday
Sunny, with a high near 55. West wind 5 to 13 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 33. North wind 3 to 6 mph.
Saturday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 48. North wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 25. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 41. Northwest wind 11 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 21. North northwest wind around 10 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 40. North northwest wind 5 to 11 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 21. Light and variable wind.
Tuesday
Mostly sunny, with a high near 48. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 37. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers. Partly sunny, with a high near 58. Southwest wind 13 to 16 mph, with gusts as high as 25 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:
5:41 pm CST Feb 18, 2026
Forecast Valid:
8pm CST Feb 18, 2026-6pm CST Feb 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation