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

30°F

-1°C

Humidity 100%
Wind Speed Calm
Barometer 30.25 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 7 Nov 6:47 am CST
Extended Forecast for

3 Miles NW Simpson IL

Frost Advisory November 7, 07:18am until November 7, 08:00am
Freeze Warning November 7, 11:00pm until November 8, 08:00am
Click here for hazard details and duration
...
Freeze Warning
  •  
    Frost Advisory November 7, 07:18am until November 7, 08:00am

    NOW until 8:00am Sat

    Frost Advisory

  • Today

    High: 55 °F

    Frost then
    Mostly Sunny

  • Tonight

    Tonight: Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 32. Calm wind.

    Low: 32 °F

    Frost

  • Sunday

    Sunday: Widespread frost before 8am. Otherwise, sunny, with a high near 62. Calm wind becoming west southwest around 6 mph.

    High: 62 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39. Calm wind.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 67. Light and variable wind.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 42. Calm wind.

    Low: 42 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 69. Calm wind becoming west southwest around 5 mph.

    High: 69 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Today
Widespread frost before 8am. Otherwise, mostly sunny, with a high near 55. Light north wind.
Tonight
Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 32. Calm wind.
Sunday
Widespread frost before 8am. Otherwise, sunny, with a high near 62. Calm wind becoming west southwest around 6 mph.
Sunday Night
Clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 67. Light and variable wind.
Monday Night
Clear, with a low around 42. Calm wind.
Tuesday
Sunny, with a high near 69. Calm wind becoming west southwest around 5 mph.
Tuesday Night
Mostly clear, with a low around 45. Calm wind.
Veterans Day
Mostly sunny, with a high near 67. Calm wind becoming west around 6 mph.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 44. Calm wind becoming north northwest around 5 mph after midnight.
Thursday
Mostly sunny, with a high near 58. North northwest wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 36. North wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 51. North northwest wind 5 to 9 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Simpson IL
 37.51°N 88.79°W
Last Update:
4:41 am CST Nov 7, 2026
Forecast Valid:
7am CST Nov 7, 2026-6pm CST Nov 13, 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