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

52°F

11°C

Humidity 88%
Wind Speed SW 6 mph
Barometer 29.98 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 7 Oct 5:55 am CDT
Extended Forecast for

2 Miles E Johnston City IL

  • Today

    Today: Sunny, with a high near 86. Calm wind becoming west southwest 5 to 9 mph in the morning.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 57. South southwest wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 54. Calm wind.

    Low: 54 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86. South southeast wind 3 to 8 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Southeast wind 3 to 5 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 83. Light south wind becoming south southeast 6 to 11 mph in the morning.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 58. East northeast wind 7 to 9 mph.

    Low: 58 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers. Partly sunny, with a high near 77. East northeast wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 86. Calm wind becoming west southwest 5 to 9 mph in the morning.
Tonight
Clear, with a low around 57. South southwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Calm wind becoming east northeast around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 54. Calm wind.
Friday
Sunny, with a high near 86. South southeast wind 3 to 8 mph.
Friday Night
Mostly clear, with a low around 60. Southeast wind 3 to 5 mph.
Saturday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 83. Light south wind becoming south southeast 6 to 11 mph in the morning.
Saturday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 58. East northeast wind 7 to 9 mph.
Sunday
A chance of showers. Partly sunny, with a high near 77. East northeast wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 57. Northwest wind around 5 mph becoming calm in the evening.
Columbus Day
Mostly sunny, with a high near 81. Calm wind becoming west 5 to 8 mph in the morning.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 58. South wind around 5 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 82. Southwest wind 5 to 13 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E Johnston City IL
 37.82°N 88.89°W
Last Update:
3:36 am CDT Oct 7, 2026
Forecast Valid:
6am CDT Oct 7, 2026-6pm CDT Oct 13, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation