I took my Euroschirm, hands free umbrella on the Portuguese.
First, I would suggest that, in a hiking environment, an umbrella that handles medium to strong winds, with or without rain, simply does not, probably cannot, exist.
Having done the CF twice in autumn, without umbrella, and the CP from Lisbon in Spring with, I have never encountered medium to strong winds.
Many have.
The umbrella for me was always about shade and for this purpose was outstanding.
Due to its limitations regarding wind I would suggest ones plan for rainware must therefore completely disregard any perceived benefits to be gained by use of an umbrella.
In providing shade protection, my Euroschirm is exceptional.
As a useful piece of equipment it is unquestionably, undeniably, too heavy for me, at 442 grams.
This will probably not be the case for some younger, fitter walkers.
My suggestion is to utilise a model that is lighter, with a max weight of 300 grams.
This will probably mean jury-rigging the attachment to the top of your pack and shoulder straps. There is much advice here on the forum, and utube videos, on how to accomplish this.
Regards
Gerard