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.

Partly Cloudy

68°F

20°C

Humidity 86%
Wind Speed S 15 mph
Barometer 29.96 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 7 Mar 1:15 am CST
Extended Forecast for

Marion IL

  • Overnight

    Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a steady temperature around 67. South wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. High near 73. South southwest wind 11 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.

    High: 73 °F

    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 7pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 42 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66. Calm wind becoming southwest around 5 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 47. South southwest wind 3 to 6 mph.

    Low: 47 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 75. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 78 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 62. South southwest wind 15 to 17 mph, with gusts as high as 29 mph.

    Low: 62 °F

    Showers

Detailed Forecast

Overnight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a steady temperature around 67. South wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Saturday
Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and noon, then a chance of showers and thunderstorms after noon. High near 73. South southwest wind 11 to 14 mph becoming west 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 7pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming calm after midnight.
Sunday
Sunny, with a high near 66. Calm wind becoming southwest around 5 mph.
Sunday Night
Clear, with a low around 47. South southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 75. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 78. South southwest wind 8 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 62. South southwest wind 15 to 17 mph, with gusts as high as 29 mph.
Wednesday
Showers and possibly a thunderstorm. Cloudy, with a high near 71. South southwest wind around 18 mph becoming north northwest in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 36. North northwest wind 7 to 16 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 56. Northwest wind 7 to 9 mph.
Thursday Night
Mostly cloudy, with a low around 40. West wind 6 to 11 mph becoming south in the evening. Winds could gust as high as 21 mph.
Friday
Mostly cloudy, with a high near 65. South southwest wind 13 to 17 mph, with gusts as high as 28 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:
12:26 am CST Mar 7, 2026
Forecast Valid:
1am CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation