I think if you had it as
default in all weather conditions in all parts of the World, for each flight you would have to change it
again to suit the local weather conditions!
Each time I fly, the conditions are different, either requiring another Flight Sim setting, or what is observed following a "Real Weather" or "REX Weather" selection.
You cant win them all in one go!...

...!
Actually...I really like playing around with "Weather" settings for each flight!
Paul...Weathering the Storm... 8-)...!
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.