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.

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

  • Overnight

    Overnight: Clear, with a low around 68. Calm wind.

    Low: 68 °F

    Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly before 7am. Sunny, with a high near 86. Light and variable wind becoming north northwest 5 to 10 mph in the morning.

    High: 86 °F

    Chance
    T-storms then
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 63. Light north wind.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy dense fog before 8am. Otherwise, sunny, with a high near 84. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 84 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Sunday Night

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

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 82. Light and variable wind.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Light east southeast wind.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. Calm wind becoming east southeast around 5 mph in the morning.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 68. Calm wind.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before 7am. Sunny, with a high near 86. Light and variable wind becoming north northwest 5 to 10 mph in the morning.
Saturday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 63. Light north wind.
Sunday
Patchy dense fog before 8am. Otherwise, sunny, with a high near 84. Calm wind becoming north northwest around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 62. Calm wind.
Monday
Mostly sunny, with a high near 82. Light and variable wind.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Light east southeast wind.
Tuesday
Mostly sunny, with a high near 85. Calm wind becoming east southeast around 5 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 66. Calm wind.
Wednesday
Mostly sunny, with a high near 87. Light and variable wind.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Calm wind.
Thursday
Sunny, with a high near 88. Calm wind becoming northwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 66. Calm wind.
Friday
Sunny, with a high near 88. Calm wind becoming north around 5 mph in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Murphysboro IL
 37.75°N 89.31°W
Last Update:
1:56 am CDT Aug 22, 2026
Forecast Valid:
2am CDT Aug 22, 2026-6pm CDT Aug 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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