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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Mostly Cloudy

58°F

14°C

Humidity 100%
Wind Speed S 6 mph
Barometer 29.99 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 17 Apr 1:35 am CDT
Extended Forecast for

Marion IL

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 86. Light south wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 24 mph.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 53. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 53 °F

    Partly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 4pm, then showers likely. High near 69. Southwest wind 11 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.

    High: 69 °F

    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 40. North northwest wind 6 to 11 mph becoming light west northwest after midnight. Winds could gust as high as 21 mph.

    Low: 40 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 68. Light west wind becoming west northwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44. Northwest wind around 6 mph becoming calm in the evening.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 51. South wind around 6 mph.

    Low: 51 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 63. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 86. Light south wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 24 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 53. South wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm before 4pm, then showers likely. High near 69. Southwest wind 11 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.
Saturday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 40. North northwest wind 6 to 11 mph becoming light west northwest after midnight. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 68. Light west wind becoming west northwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Sunday Night
Mostly clear, with a low around 44. Northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 72. Light and variable wind becoming south 5 to 7 mph in the morning.
Monday Night
Clear, with a low around 51. South wind around 6 mph.
Tuesday
Mostly sunny, with a high near 79. Southwest wind 6 to 13 mph, with gusts as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 56. South southwest wind 6 to 8 mph.
Wednesday
Sunny, with a high near 80. South southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 59. South wind around 6 mph.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. South wind 6 to 11 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
1:26 am CDT Apr 17, 2026
Forecast Valid:
1am CDT Apr 17, 2026-6pm CDT Apr 23, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation