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.

Fair

66°F

19°C

Humidity 78%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 4 Oct 12:35 am CDT
Extended Forecast for

4 Miles SSW Marion IL

  • Overnight

    Overnight: Patchy fog after 3am. Otherwise, clear, with a low around 61. Calm wind.

    Low: 61 °F

    Patchy Fog

  • Saturday

    Saturday: Sunny, with a high near 85. South southeast wind 3 to 7 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58. Light south southeast wind.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 85. Light south southeast wind becoming south 5 to 9 mph in the morning.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. Light south southeast wind.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 80. Calm wind becoming north around 6 mph in the afternoon.

    High: 80 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 59. North northeast wind 5 to 7 mph.

    Low: 59 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 3am. Otherwise, clear, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 85. South southeast wind 3 to 7 mph.
Saturday Night
Clear, with a low around 58. Light south southeast wind.
Sunday
Sunny, with a high near 85. Light south southeast wind becoming south 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 65. Light south southeast wind.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 30%.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Calm wind.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Calm wind becoming north around 6 mph in the afternoon.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 59. North northeast wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 75. Northeast wind 8 to 10 mph.
Wednesday Night
Mostly clear, with a low around 53. East northeast wind around 6 mph.
Thursday
Sunny, with a high near 75. East wind around 7 mph.
Thursday Night
Mostly clear, with a low around 52. Calm wind.
Friday
Sunny, with a high near 77. Calm wind becoming south around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Marion IL
 37.67°N 88.98°W
Last Update:
11:01 pm CDT Oct 3, 2025
Forecast Valid:
12am CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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Additional Resources

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Chance of Precipitation