I've been a long term browser of these forums, but this is my first post amazingly!
Anyhow, I have the same problem in my 2016 IS200T, lots of wind noise from around the drivers door, but only starts at 65mph. Happens whatever the weather conditions. Can't see any visible fault or damaged trim, etc, just thought it wad a foible of the car! Almost reassuring to know its not just mine...