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Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
70°F
21°C
| Humidity | 68% |
| Wind Speed | Calm |
| Barometer | 30.07 in |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 29 Aug 11:15 pm CDT |
Extended Forecast for
Johnston City IL
Tonight
Low: 59 °F
Mostly Clear
Saturday
High: 86 °F
Sunny
Saturday Night
Low: 60 °F
Partly Cloudy
Sunday
High: 84 °F
Mostly Sunny
Sunday Night
Low: 58 °F
Mostly Cloudy
Labor Day
High: 83 °F
Partly Sunny
Monday Night
Low: 60 °F
Mostly Cloudy
then Slight
Chance
ShowersTuesday
High: 80 °F
Chance
Showers then
Chance
T-stormsTuesday Night
Low: 60 °F
Chance
Showers
Detailed Forecast
Tonight
Mostly clear, with a low around 59. Calm wind.
Saturday
Sunny, with a high near 86. Light east wind becoming northeast 5 to 9 mph in the morning.
Saturday Night
Partly cloudy, with a low around 60. East northeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 84. Light east northeast wind increasing to 5 to 10 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 58. East northeast wind 3 to 7 mph.
Labor Day
Partly sunny, with a high near 83. East northeast wind 3 to 6 mph.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 60. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Calm wind becoming southeast around 6 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. East southeast wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. Calm wind becoming northwest 5 to 9 mph in the morning.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 54. North northwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 74. North northwest wind 7 to 10 mph.
Thursday Night
Mostly clear, with a low around 49. North northwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 78. Light west wind increasing to 5 to 9 mph in the morning.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Johnston City IL
37.85°N 88.94°W
37.85°N 88.94°W
9:46 pm CDT Aug 29, 2025
11pm CDT Aug 29, 2025-6pm CDT Sep 5, 2025
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