Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
39°F
4°C
| Humidity | 65% |
| Wind Speed | S 12 mph |
| Barometer | 30.00 in |
| Dewpoint | 28°F (-2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 32°F (0°C) |
| Last update | 13 Jan 6:45 am CST |
Extended Forecast for
Johnston City IL
Today
High: 61 °F
Mostly Sunny
Tonight
Low: 40 °F
Chance
ShowersWednesday
High: 46 °F⇓
Partly Sunny
Wednesday Night
Low: 19 °F
Mostly Clear
Thursday
High: 32 °F
Sunny
Thursday Night
Low: 24 °F
Mostly Cloudy
Friday
High: 46 °F
Partly Sunny
Friday Night
Low: 23 °F
Mostly Cloudy
Saturday
High: 34 °F
Partly Sunny
Detailed Forecast
Today
Mostly sunny, with a high near 61. Southwest wind 11 to 16 mph, with gusts as high as 29 mph.
Tonight
A 40 percent chance of showers, mainly before 1am. Cloudy, with a low around 40. Southwest wind 5 to 10 mph becoming northwest after midnight.
Wednesday
Partly sunny, with a temperature falling to around 34 by 5pm. North northwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Wednesday Night
Mostly clear, with a low around 19. North northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 25 mph.
Thursday
Sunny, with a high near 32. Northwest wind 5 to 8 mph becoming southwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 24. Light south southwest wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 23 mph.
Friday
Partly sunny, with a high near 46. West wind 11 to 17 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 23. West wind 8 to 10 mph, with gusts as high as 18 mph.
Saturday
Partly sunny, with a high near 34. West wind 10 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Mostly cloudy, with a low around 12. West northwest wind 8 to 10 mph.
Sunday
Mostly sunny, with a high near 27. West northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 13. West wind 6 to 8 mph.
M.L.King Day
Sunny, with a high near 36. West wind 7 to 11 mph, with gusts as high as 18 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Johnston City IL
37.82°N 88.91°W
37.82°N 88.91°W
3:16 am CST Jan 13, 2026
6am CST Jan 13, 2026-6pm CST Jan 19, 2026
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