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.

Light Drizzle Fog/Mist

59°F

15°C

Humidity 88%
Wind Speed NW 9 mph
Barometer 30.07 in
Dewpoint 55°F (13°C)
Visibility 4.00 mi
Last update 16 Oct 3:35 am CDT
Extended Forecast for

5 Miles SW Marion IL

  • Overnight

    Overnight: A 30 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 49. Northwest wind around 15 mph, with gusts as high as 30 mph.

    Low: 49 °F

    Chance
    Showers

  • Friday

    Friday: A 10 percent chance of showers before 7am. Cloudy during the morning, then mostly sunny during the afternoon, with a high near 56. Northwest wind 14 to 16 mph, with gusts as high as 29 mph.

    High: 56 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41. North wind 11 to 15 mph, with gusts as high as 23 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 60. North northeast wind 8 to 10 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy frost after 4am. Otherwise, clear, with a low around 36. Calm wind.

    Low: 36 °F

    Clear then
    Patchy Frost

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 66 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70. Calm wind becoming south around 5 mph.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 49. Northwest wind around 15 mph, with gusts as high as 30 mph.
Friday
A 10 percent chance of showers before 7am. Cloudy during the morning, then mostly sunny during the afternoon, with a high near 56. Northwest wind 14 to 16 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, with a low around 41. North wind 11 to 15 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 60. North northeast wind 8 to 10 mph.
Saturday Night
Patchy frost after 4am. Otherwise, clear, with a low around 36. Calm wind.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 38. Calm wind.
Monday
Sunny, with a high near 70. Calm wind becoming south around 5 mph.
Monday Night
Mostly clear, with a low around 43. Calm wind.
Tuesday
Sunny, with a high near 74. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 44. Calm wind.
Wednesday
Sunny, with a high near 77. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 47. Calm wind.
Thursday
Sunny, with a high near 79. Calm wind becoming south around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Marion IL
 37.67°N 88.98°W
Last Update:
2:01 am CDT Oct 16, 2026
Forecast Valid:
3am CDT Oct 16, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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Chance of Precipitation