I am experiencing this as well. At first I thought it was due to an update that maybe had the windows down slightly but then I realized it wasn't always there and only happenswhen it's very cold. Definitely sounds like a windows is just slightly open.
Curious about others experience with the CT in very cold weather (less than 15F), excluding effects on battery/range.
My experience thus far has been a bit strange. The heater is surprisingly loud, whines, and sounds like it's struggling. Occasionally when I go over 60mph the motor gets very...