We walked from Porto this last June. The weather, most of the time was incredibly hot ( 35 deg.plus). That is no guarantee that it will be the same again next year!
However, due to the fact that we were walking ' into summer' and not as we usually do ' into Autumn', I decided to eliminate the sleeping bags and bought a couple of cheap fleece blankets, which I doubled over, sewed Velcro along the bottom and a bit up the side. In that way, they could be used either open or closed like a sleeping bag. I also cut up a microfiber sheet, to use underneath the blanket. It worked perfectly and we gained at least half kilo in weight, not to mention the volume on our packs. Personally, I have never liked to use the Albergue blankets. , I would certainly do this again use this blanket system again, if not in very cold weather.