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

Heavy Rainfall and Flooding in the Mid-Atlantic; Heat and Wildfire Concerns in the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region through tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the West with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fog/Mist

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 30.03 in (1016.4 mb)
Dewpoint 72°F (22°C)
Visibility 2.50 mi
Last update 15 Jul 4:52 am CDT
Extended Forecast for

Murphysboro IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms. Patchy fog. Otherwise, mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 4pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 89. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 89 °F

    Chance
    Showers and
    Patchy Fog
    then T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 4am, then a slight chance of showers. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 73 °F

    T-storms
    Likely then
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 91. Southwest wind 3 to 7 mph.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75. South southwest wind 3 to 6 mph.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Southwest wind 3 to 7 mph.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Light and variable wind.

    High: 89 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light and variable wind.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms. Patchy fog. Otherwise, mostly cloudy, with a low around 72. Calm wind.
Tuesday
Showers and thunderstorms likely, mainly after 4pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 89. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 60%.
Tuesday Night
Showers and thunderstorms likely before 4am, then a slight chance of showers. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 91. Southwest wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 75. South southwest wind 3 to 6 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Southwest wind 3 to 7 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. West southwest wind around 5 mph becoming calm in the evening.
Friday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Light and variable wind.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light and variable wind.
Saturday
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. South southwest wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 75. South southwest wind around 6 mph.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind 6 to 8 mph.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. South wind around 6 mph.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. South southwest wind 6 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Murphysboro IL
 37.77°N 89.37°W
Last Update:
4:31 am CDT Jul 15, 2025
Forecast Valid:
5am CDT Jul 15, 2025-6pm CDT Jul 21, 2025
 
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