Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

23°F

-5°C

Humidity 58%
Wind Speed Calm
Barometer 30.44 in
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Last update 23 Feb 8:15 pm CST
Extended Forecast for

Johnston City IL

  • Tonight

    Tonight: Mostly clear, with a low around 20. Calm wind becoming south around 5 mph after midnight.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 50. Breezy, with a south southwest wind 7 to 12 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 50 °F

    Increasing
    Clouds and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. Breezy, with a southwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 29 mph.

    Low: 40 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 57. West southwest wind around 6 mph becoming northeast in the afternoon.

    High: 57 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers, mainly after midnight.  Mostly cloudy, with a low around 40. East wind 5 to 8 mph.

    Low: 40 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers before noon.  Partly sunny, with a high near 52. North northeast wind 7 to 10 mph.

    High: 52 °F

    Chance
    Showers then
    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 33. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 33 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 61. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 39. South southwest wind around 6 mph.

    Low: 39 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 20. Calm wind becoming south around 5 mph after midnight.
Tuesday
Increasing clouds, with a high near 50. Breezy, with a south southwest wind 7 to 12 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 37 mph.
Tuesday Night
Mostly cloudy, with a low around 40. Breezy, with a southwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 29 mph.
Wednesday
Partly sunny, with a high near 57. West southwest wind around 6 mph becoming northeast in the afternoon.
Wednesday Night
A 50 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 40. East wind 5 to 8 mph.
Thursday
A 50 percent chance of showers before noon. Partly sunny, with a high near 52. North northeast wind 7 to 10 mph.
Thursday Night
Partly cloudy, with a low around 33. North northwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 61. Calm wind becoming south southwest 5 to 8 mph in the morning.
Friday Night
Clear, with a low around 39. South southwest wind around 6 mph.
Saturday
Sunny, with a high near 66. South southwest wind 6 to 10 mph.
Saturday Night
Partly cloudy, with a low around 37. South wind around 9 mph becoming north after midnight.
Sunday
A chance of showers. Partly sunny, with a high near 53. East northeast wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 36. East northeast wind around 10 mph.
Monday
A chance of showers. Partly sunny, with a high near 54. North northeast wind 9 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Johnston City IL
 37.82°N 88.91°W
5:21 pm CST Feb 23, 2026
8pm CST Feb 23, 2026-6pm CST Mar 2, 2026
 
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Additional Resources

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