Caceres to Santiago Oct 8th to Nov 8th... q on how cold?

Hello khizr.
Well I'm happy your going on your Camino. I know it's going to be a blast for ya'. I'm planning to walk the VdlP roughly the same time you are. I'm planning to be starting from Seville on October 3. I do not mean to question your planning, but to me, your gonna be going a touch slow. I don't know your circumstances as to why, but I'm planning to do the same streach your doing in 17-18 days.
To answer your question about the weather. Everything I've read it seems that we should expect upper 70°f during the days and low to mid 50s at night. That being said, it is weather. I am going to be taking my raincoat and pants. Not so much for the rain, but for the wind. It can get pretty chilly up in those mountains. I walked the Camino Frances March-April 2012. Was chilly!! I'm not planning for a lot of rain. But I'll still have my gear. I have a light cuccoon type sleeping bag I think will serve me ok.
I don't know if this is your first Camino or hiker, but if it is, really really think about what your taking. I saw all these people running around with 40-65 liter backpacks. Yes 65 liter bag!!! I had the smallest one at 26 liters and am really thinking about going down to a 20 liter backpack!!

I've done the trip later in the year twice (late October-early December, and mid November-late December) and didn't carry a sleeping bag either time. It did get cooler further north (I got mild frost-bite in freezing fog near Zamora) and very wet in Galicia, but I never regretted the lack of a sleeping bag - all the albergues had blankets, and they were mostly empty at that time of year, so there were always plenty to go round when I needed more than one (Mombuey).

God Bless you Sir!!! I personally would prefer my cuccoon sleeping bag. I know exactly who's been sleeping in it. It snowed in Roncesvalles and my light bag was more than enough!!

I can't comment on sleeping bags, as I've never carried one, but I have walked the VDLP several times in October and November. It's generally been cold in the mornings, but warms up pretty quickly. My go-to items: light gloves for the first hour or so walking, and compression socks and/or arm sleeves, which are very lightweight and small to pack, but keep you very warm.

Melanie