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

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

A Few Clouds

82°F

28°C

Humidity 35%
Wind Speed Calm
Barometer 30.11 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 1 Sep 1:45 pm CDT
Extended Forecast for

2 Miles ESE Herrin IL

  • Labor Day

    Labor Day: Sunny, with a high near 86. East northeast wind around 7 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 60. Northeast wind around 6 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 58. Southwest wind 5 to 7 mph becoming northwest after midnight. Chance of precipitation is 60%.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 75. North northwest wind around 9 mph.

    High: 75 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. Light and variable wind.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 85. South wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 18 mph.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Labor Day
Sunny, with a high near 86. East northeast wind around 7 mph.
Tonight
Partly cloudy, with a low around 60. Northeast wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 84. Calm wind becoming north northeast around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 61. Calm wind.
Wednesday
Mostly sunny, with a high near 87. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 58. Southwest wind 5 to 7 mph becoming northwest after midnight. Chance of precipitation is 60%.
Thursday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 75. North northwest wind around 9 mph.
Thursday Night
Mostly clear, with a low around 52. Light and variable wind.
Friday
Mostly sunny, with a high near 85. South wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A chance of showers. Partly cloudy, with a low around 51. North wind 5 to 8 mph.
Saturday
Mostly sunny, with a high near 79. North northwest wind 3 to 8 mph.
Saturday Night
Mostly clear, with a low around 50. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 79. Calm wind becoming north northeast 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Herrin IL
 37.8°N 89°W
Last Update:
2:01 pm CDT Sep 1, 2025
Forecast Valid:
3pm CDT Sep 1, 2025-6pm CDT Sep 7, 2025
 
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Additional Resources

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Chance of Precipitation