Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
24°F
-4°C
| Humidity | 75% |
| Wind Speed | SW 5 mph |
| Barometer | 30.43 in |
| Dewpoint | 17°F (-8°C) |
| Visibility | 10.00 mi |
| Wind Chill | 18°F (-8°C) |
| Last update | 12 Jan 6:15 am CST |
Extended Forecast for
Johnston City IL
Today
High: 51 °F
Sunny
Tonight
Low: 35 °F
Mostly Clear
Tuesday
High: 59 °F
Sunny
Tuesday Night
Low: 41 °F
Chance
ShowersWednesday
High: 45 °F
Slight Chance
Showers then
Mostly Cloudy
and BreezyWednesday Night
Low: 19 °F
Mostly Cloudy
and Blustery
then Mostly
CloudyThursday
High: 33 °F
Sunny
Thursday Night
Low: 23 °F
Mostly Cloudy
Friday
High: 44 °F
Partly Sunny
Detailed Forecast
Today
Sunny, with a high near 51. Southwest wind 7 to 13 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 35. South southwest wind 6 to 9 mph.
Tuesday
Sunny, with a high near 59. Southwest wind 10 to 15 mph, with gusts as high as 22 mph.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 41. Southwest wind 6 to 11 mph becoming west northwest after midnight. Winds could gust as high as 18 mph.
Wednesday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 45. Breezy, with a northwest wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
Mostly cloudy, with a low around 19. Blustery, with a north northwest wind 13 to 20 mph, with gusts as high as 28 mph.
Thursday
Sunny, with a high near 33. North northwest wind 5 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 23. Light and variable wind becoming south southwest 5 to 10 mph in the evening.
Friday
Partly sunny, with a high near 44. South southwest wind 9 to 15 mph, with gusts as high as 22 mph.
Friday Night
Mostly cloudy, with a low around 23. West wind 6 to 9 mph.
Saturday
Partly sunny, with a high near 34. West northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 13. West northwest wind 8 to 10 mph.
Sunday
Sunny, with a high near 30. West northwest wind 8 to 13 mph, with gusts as high as 20 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 12, 2026
6am CST Jan 12, 2026-6pm CST Jan 18, 2026
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