National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

54°F

12°C

Humidity 63%
Wind Speed S 6 mph
Barometer 30.05 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 10 Nov 10:35 pm CST
Extended Forecast for

Johnston City IL

  • Tonight

    Tonight: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Partly sunny, then gradually becoming sunny, with a high near 72. Light and variable wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 22 mph.

    High: 72 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40. Northwest wind 9 to 13 mph, with gusts as high as 18 mph.

    Low: 40 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 53. North northwest wind 9 to 16 mph, with gusts as high as 22 mph.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30. North northwest wind 5 to 11 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 48. North northwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. North northwest wind around 5 mph becoming calm in the evening.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 50. Light north northwest wind.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 45. Calm wind.
Veterans Day
Partly sunny, then gradually becoming sunny, with a high near 72. Light and variable wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 22 mph.
Wednesday Night
Mostly clear, with a low around 40. Northwest wind 9 to 13 mph, with gusts as high as 18 mph.
Thursday
Mostly sunny, with a high near 53. North northwest wind 9 to 16 mph, with gusts as high as 22 mph.
Thursday Night
Mostly clear, with a low around 30. North northwest wind 5 to 11 mph.
Friday
Sunny, with a high near 48. North northwest wind 6 to 11 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 25. North northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 50. Light north northwest wind.
Saturday Night
Mostly clear, with a low around 28. Calm wind.
Sunday
Mostly sunny, with a high near 53. Calm wind becoming east southeast around 6 mph.
Sunday Night
Partly cloudy, with a low around 32. Calm wind.
Monday
Mostly sunny, with a high near 54. Calm wind becoming east 5 to 7 mph.
Monday Night
Mostly clear, with a low around 32. Calm wind.
Tuesday
Sunny, with a high near 57. Calm wind becoming east around 6 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Johnston City IL
 37.82°N 88.94°W
Last Update:
5:46 pm CST Nov 10, 2026
Forecast Valid:
10pm CST Nov 10, 2026-6pm CST Nov 17, 2026
 
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Additional Resources

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Chance of Precipitation