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

66°F

19°C

Humidity 78%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 4 Oct 12:35 am CDT
Extended Forecast for

2 Miles E Johnston City IL

  • Overnight

    Overnight: Clear, with a low around 61. Calm wind.

    Low: 61 °F

    Clear

  • Saturday

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

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58. Light south southeast wind.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86. South wind 5 to 10 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. South southeast wind 3 to 5 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 83. South southeast wind 3 to 6 mph.

    High: 83 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65. Light southeast wind.

    Low: 65 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Calm wind becoming north 5 to 7 mph in the morning.

    High: 81 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 59. North northeast wind 6 to 8 mph.

    Low: 59 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 61. Calm wind.
Saturday
Sunny, with a high near 86. South southeast wind 3 to 8 mph.
Saturday Night
Clear, with a low around 58. Light south southeast wind.
Sunday
Sunny, with a high near 86. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 65. South southeast wind 3 to 5 mph.
Monday
A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 83. South southeast wind 3 to 6 mph.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65. Light southeast wind.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Calm wind becoming north 5 to 7 mph in the morning.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 59. North northeast wind 6 to 8 mph.
Wednesday
Mostly sunny, with a high near 75. Northeast wind 9 to 11 mph.
Wednesday Night
Mostly clear, with a low around 53. East northeast wind 6 to 8 mph.
Thursday
Sunny, with a high near 75. East wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 51. Light east wind.
Friday
Sunny, with a high near 77. Calm wind becoming south southwest 5 to 7 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:
11:01 pm CDT Oct 3, 2025
Forecast Valid:
12am CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation