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.

Overcast

55°F

13°C

Humidity 62%
Wind Speed NW 8 G 16 mph
Barometer 30.09 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 10 Apr 7:55 pm CDT
Extended Forecast for

Johnston City IL

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 44. Calm wind becoming northwest around 6 mph after midnight. Chance of precipitation is 50%.

    Low: 44 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 58. North wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 58 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 34. North wind 5 to 7 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 61. Calm wind.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 70. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 70 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers before 1pm. Mostly cloudy, with a high near 70. Southwest wind 10 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 70 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45. West northwest wind around 8 mph.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 44. Calm wind becoming northwest around 6 mph after midnight. Chance of precipitation is 50%.
Friday
Partly sunny, with a high near 58. North wind 7 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 34. North wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 61. Calm wind.
Saturday Night
Mostly clear, with a low around 42. Calm wind becoming south southeast around 5 mph after midnight.
Sunday
Sunny, with a high near 70. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 21 mph.
Monday
A slight chance of showers before 1pm. Mostly cloudy, with a high near 70. Southwest wind 10 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Partly cloudy, with a low around 45. West northwest wind around 8 mph.
Tuesday
Sunny, with a high near 63. West northwest wind 7 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 40. Northwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 65. Calm wind becoming north northwest around 5 mph in the morning.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 48. East southeast wind 3 to 5 mph.
Thursday
A chance of showers. Partly sunny, with a high near 66. Southeast wind 6 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Johnston City IL
 37.82°N 88.91°W
Last Update:
7:51 pm CDT Apr 10, 2025
Forecast Valid:
8pm CDT Apr 10, 2025-6pm CDT Apr 17, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation