Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
Fair
61°F
16°C
| Humidity | 83% |
| Wind Speed | NW 6 mph |
| Barometer | 30.03 in |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 11 Oct 8:45 am CDT |
Extended Forecast for
Johnston City IL
Today
High: 85 °F
Sunny
Tonight
Low: 61 °F
Mostly Clear
Columbus Day
High: 91 °F
Becoming
SunnyMonday Night
Low: 67 °F
Clear
Tuesday
High: 93 °F
Sunny
Tuesday Night
Low: 70 °F
Mostly Clear
then Slight
Chance
T-stormsWednesday
High: 87 °F
Showers
LikelyWednesday Night
Low: 65 °F
Chance
ShowersThursday
High: 82 °F
Chance
Showers
Detailed Forecast
Today
Sunny, with a high near 85. West northwest wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 61. Light south wind.
Columbus Day
Partly sunny, then gradually becoming sunny, with a high near 91. Southwest wind 5 to 14 mph, with gusts as high as 18 mph.
Monday Night
Clear, with a low around 67. Southwest wind around 8 mph.
Tuesday
Sunny, with a high near 93. Southwest wind 8 to 13 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. Southwest wind around 6 mph.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87. West southwest wind 3 to 8 mph. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Northeast wind 3 to 6 mph.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. East wind 8 to 11 mph becoming south southwest in the afternoon.
Thursday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 56. South southwest wind 7 to 10 mph becoming west after midnight.
Friday
A slight chance of showers. Partly sunny, with a high near 71. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 24 mph.
Friday Night
Partly cloudy, with a low around 43. Breezy, with a north northwest wind 10 to 20 mph.
Saturday
Mostly sunny, with a high near 62. North wind 13 to 16 mph, with gusts as high as 21 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
4:56 am CDT Oct 11, 2026
9am CDT Oct 11, 2026-6pm CDT Oct 17, 2026
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