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.

Light Rain

69°F

21°C

Humidity 98%
Wind Speed N 6 mph
Barometer 29.73 in
Dewpoint 68°F (20°C)
Visibility 5.00 mi
Last update 2 Aug 5:15 am CDT
Extended Forecast for

2 Miles E Johnston City IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 81. North northwest wind 13 to 15 mph, with gusts as high as 23 mph.

    High: 81 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 65. North wind 6 to 11 mph becoming light after midnight.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 86. North wind 3 to 8 mph.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Clear, with a low around 64. North northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Light and variable wind.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91. South southwest wind 3 to 8 mph.

    High: 91 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 81. North northwest wind 13 to 15 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 65. North wind 6 to 11 mph becoming light after midnight.
Monday
Mostly sunny, with a high near 86. North wind 3 to 8 mph.
Monday Night
Clear, with a low around 64. North northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 89. Calm wind becoming northeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 66. Calm wind.
Wednesday
Sunny, with a high near 92. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 70. Calm wind.
Thursday
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91. South southwest wind 3 to 8 mph.
Thursday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 71. South wind around 6 mph becoming calm in the evening.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind 3 to 8 mph.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind around 5 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind becoming south southwest 5 to 8 mph in the morning.
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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:
3:46 am CDT Aug 2, 2026
Forecast Valid:
5am CDT Aug 2, 2026-6pm CDT Aug 8, 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