Current conditions at
Marion - Williamson County Regional Airport (KMWA)
Lat: 37.77°NLon: 89.01°WElev: 486ft.
A Few Clouds
46°F
8°C
| Humidity | 46% |
| Wind Speed | S 14 mph |
| Barometer | 30.21 in |
| Dewpoint | 27°F (-3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 40°F (4°C) |
| Last update | 12 Jan 4:45 pm CST |
Extended Forecast for
Johnston City IL
This Afternoon
High: 48 °F
Sunny
Tonight
Low: 35 °F
Mostly Clear
Tuesday
High: 60 °F
Sunny
Tuesday Night
Low: 40 °F
Chance
ShowersWednesday
High: 45 °F
Slight Chance
Showers then
Mostly Cloudy
and BreezyWednesday Night
Low: 18 °F
Mostly Cloudy
and Blustery
then Mostly
ClearThursday
High: 32 °F
Sunny
Thursday Night
Low: 23 °F
Mostly Cloudy
Friday
High: 45 °F
Partly Sunny
Detailed Forecast
This Afternoon
Sunny, with a steady temperature around 48. South southwest wind around 10 mph.
Tonight
Mostly clear, with a low around 35. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 60. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
A 40 percent chance of showers. Increasing clouds, with a low around 40. Southwest wind 6 to 10 mph becoming west northwest after midnight.
Wednesday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 45. Breezy, with a north 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
Partly cloudy, with a low around 18. Blustery, with a north northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 26 mph.
Thursday
Sunny, with a high near 32. North northwest wind 5 to 9 mph becoming west southwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 23. Light west southwest wind becoming south southwest 5 to 10 mph in the evening. Winds could gust as high as 20 mph.
Friday
Partly sunny, with a high near 45. West wind 10 to 15 mph, with gusts as high as 23 mph.
Friday Night
Mostly cloudy, with a low around 20. West wind 8 to 10 mph.
Saturday
Partly sunny, with a high near 31. West wind 10 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 12. West wind around 10 mph.
Sunday
Mostly sunny, with a high near 27. West northwest wind 8 to 13 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 pm CST Jan 12, 2026
4pm CST Jan 12, 2026-6pm CST Jan 18, 2026
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