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

64°F

18°C

Humidity 86%
Wind Speed SW 12 G 21 mph
Barometer 29.76 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 9 Jan 4:15 am CST
Extended Forecast for

Marion IL

  • Today

    Today: Partly sunny, with a temperature falling to around 51 by 9am. West wind 5 to 13 mph becoming north northeast in the afternoon. Winds could gust as high as 24 mph.

    High: 55 °F⇓

    Partly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers after 3am. Mostly cloudy, with a low around 43. Northeast wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before noon. Cloudy through mid morning, then gradual clearing, with a high near 49. Light northwest wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 23 mph.

    High: 49 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 48. South southwest wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35. South southwest wind 6 to 8 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 55 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a temperature falling to around 51 by 9am. West wind 5 to 13 mph becoming north northeast in the afternoon. Winds could gust as high as 24 mph.
Tonight
A 40 percent chance of showers after 3am. Mostly cloudy, with a low around 43. Northeast wind around 5 mph becoming calm in the evening.
Saturday
A 20 percent chance of showers before noon. Cloudy through mid morning, then gradual clearing, with a high near 49. Light northwest wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 26. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 38. Northwest wind 5 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Mostly clear, with a low around 25. Calm wind becoming south southwest around 5 mph after midnight.
Monday
Sunny, with a high near 48. South southwest wind 6 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 35. South southwest wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 55. South southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 39. South southwest wind 6 to 10 mph becoming west northwest after midnight.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 45. North northwest wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 26. North northwest wind 6 to 9 mph.
Thursday
Mostly sunny, with a high near 39. North northwest wind 5 to 7 mph becoming south southwest in the afternoon.
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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:
3:16 am CST Jan 9, 2026
Forecast Valid:
4am CST Jan 9, 2026-6pm CST Jan 15, 2026
 
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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