Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

63°F

17°C

Humidity 93%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 1 Oct 1:55 am CDT
Extended Forecast for

Johnston City IL

  • Overnight

    Overnight: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. Calm wind becoming east 5 to 7 mph in the morning.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. Light east wind.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming south southwest around 6 mph in the morning.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59. Calm wind.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Calm wind becoming south 5 to 8 mph in the morning.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60. South southeast wind 3 to 5 mph.

    Low: 60 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. Calm wind.
Wednesday
Mostly sunny, with a high near 87. Calm wind becoming east 5 to 7 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 63. Light east wind.
Thursday
Mostly sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 64. Calm wind.
Friday
Sunny, with a high near 87. Calm wind becoming south southwest around 6 mph in the morning.
Friday Night
Clear, with a low around 59. Calm wind.
Saturday
Sunny, with a high near 85. Calm wind becoming south 5 to 8 mph in the morning.
Saturday Night
Clear, with a low around 60. South southeast wind 3 to 5 mph.
Sunday
Sunny, with a high near 84. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 63. Light south southeast wind.
Monday
Mostly sunny, with a high near 84. South southeast wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 63. Light southeast wind.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. Southwest wind 3 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Johnston City IL
 37.82°N 88.91°W
1:30 am CDT Oct 1, 2025
2am CDT Oct 1, 2025-6pm CDT Oct 7, 2025
 
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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