Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

11°F

-12°C

Humidity 60%
Wind Speed S 9 mph
Barometer 30.29 in
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill-2°F (-19°C)
Last update 27 Jan 3:35 am CST
Extended Forecast for

Marion IL

Extreme Cold Warning January 27, 03:45am until January 27, 10:00am
Click here for hazard details and duration
Extreme Cold Warning
  •  
    Extreme Cold Warning January 27, 03:45am until January 27, 10:00am

    NOW until 10:00am Tue

    Extreme Cold Warning

  • Overnight

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31. Wind chill values as low as -1. Southwest wind 6 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 31 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 0. Light northwest wind.

    Low: 0 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 29. Wind chill values as low as zero. Calm wind becoming west around 6 mph.

    High: 29 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10. Calm wind.

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 24. Calm wind becoming north around 6 mph in the afternoon.

    High: 24 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 4. North wind 3 to 6 mph.

    Low: 4 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 16. North wind 6 to 10 mph.

    High: 16 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 12. Wind chill values as low as -3. South southwest wind around 11 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 31. Wind chill values as low as -1. Southwest wind 6 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 0. Light northwest wind.
Wednesday
Mostly sunny, with a high near 29. Wind chill values as low as zero. Calm wind becoming west around 6 mph.
Wednesday Night
Partly cloudy, with a low around 10. Calm wind.
Thursday
Mostly cloudy, with a high near 24. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 4. North wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 16. North wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around -1. North wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 17. Northwest wind 6 to 9 mph.
Saturday Night
Partly cloudy, with a low around 2. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 25. Calm wind becoming west around 6 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 10. Southwest wind 3 to 5 mph.
Monday
Partly sunny, with a high near 32. West southwest wind 5 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
3:26 am CST Jan 27, 2026
3am CST Jan 27, 2026-6pm CST Feb 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database