Like the VF off-season (I did Vercellito Fidenza in January 2020) , the CF in winter requires more thought, planning and carrying extra gear and food. It's being weather aware - so not setting out in poor conditions particularly in mountainous or isolated sections. There is plenty of winter advice if you do a search on the forum but two useful resources
(1) an online list of albergues that have responded they are open - not everyone contributes so there will be others open
(2)
wise pilgrim app - if you tap into each town it will tell you with a traffic light system of red, orange and green if an albergue is closed, maybe or open. But it is wise in many cases to contact in advance! Currently due to moving over to 2024 most of the "open" are orange. And this is great advantage of
wise pilgrim- it will assist you in sending a WhatsApp message in Spanish (very quickly and easily)