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

38°F

3°C

Humidity 68%
Wind Speed N 8 mph
Barometer 30.29 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 12 Mar 2:15 am CDT
Extended Forecast for

Marion IL

  • Overnight

    Overnight: Mostly cloudy early, then becoming clear, with a low around 33. North northwest wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 55. Light and variable wind becoming west northwest 5 to 8 mph in the morning.

    High: 55 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. South southwest wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 29 mph.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 64. Southwest wind 13 to 18 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. West northwest wind around 6 mph becoming light and variable.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67. East northeast wind 7 to 10 mph becoming south southeast in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55. Southeast wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 14 to 22 mph, with gusts as high as 36 mph.

    High: 71 °F

    Showers
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Rain and snow showers likely, mainly before 1am. Some thunder is also possible. Mostly cloudy, with a low around 27. Breezy, with a southwest wind around 22 mph becoming west northwest after midnight. Winds could gust as high as 33 mph.

    Low: 27 °F

    Rain/Snow
    Likely and
    Breezy

Detailed Forecast

Overnight
Mostly cloudy early, then becoming clear, with a low around 33. North northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 55. Light and variable wind becoming west northwest 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 42. South southwest wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 29 mph.
Friday
Mostly sunny, with a high near 64. Southwest wind 13 to 18 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 38. West northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 67. East northeast wind 7 to 10 mph becoming south southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 55. Southeast wind 7 to 10 mph, with gusts as high as 21 mph.
Sunday
A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71. Breezy, with a south wind 14 to 22 mph, with gusts as high as 36 mph.
Sunday Night
Rain and snow showers likely, mainly before 1am. Some thunder is also possible. Mostly cloudy, with a low around 27. Breezy, with a southwest wind around 22 mph becoming west northwest after midnight. Winds could gust as high as 33 mph.
Monday
Partly sunny, with a high near 37. Breezy, with a west northwest wind 17 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 18. Northwest wind 6 to 13 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 42. North northwest wind 5 to 7 mph becoming west southwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 32. Southeast wind around 6 mph.
Wednesday
Mostly cloudy, with a high near 58. South southwest wind 7 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
1:26 am CDT Mar 12, 2026
Forecast Valid:
2am CDT Mar 12, 2026-6pm CDT Mar 18, 2026
 
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Additional Resources

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