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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

78°F

26°C

Humidity 88%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 19 Aug 12:35 am CDT
Extended Forecast for

2 Miles NNW Tunnel Hill IL

Heat Advisory August 19, 12:50am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 19, 12:50am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Overnight

    Low: 76 °F

    Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Sunny, with a high near 95. Calm wind.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light and variable wind.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming north around 6 mph in the morning.

    High: 89 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 87. North northeast wind around 6 mph.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68. North northeast wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Light north northeast wind.

    High: 89 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 76. Calm wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Sunny, with a high near 95. Calm wind.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light and variable wind.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming north around 6 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 87. North northeast wind around 6 mph.
Thursday Night
Mostly clear, with a low around 68. North northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 89. Light north northeast wind.
Friday Night
Mostly clear, with a low around 68. Calm wind.
Saturday
Sunny, with a high near 89. Calm wind becoming north northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. Light north wind.
Sunday
Sunny, with a high near 83. North wind 3 to 6 mph.
Sunday Night
Mostly clear, with a low around 59. North wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 80. 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:
2 Miles NNW Tunnel Hill IL
 37.6°N 88.9°W
Last Update:
11:31 pm CDT Aug 18, 2025
Forecast Valid:
12am CDT Aug 19, 2025-6pm CDT Aug 25, 2025
 
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