September or October

September is a lovely time to walk el camino. The heat, and crowds, of August have passed and it is harvest time. There is plenty of fruit about - figs, chestnuts, apples, pears, grapes, rasberries . yum! I walked in September in 2007 and besides 4 days of heavy rain at the start, it was a fairaly dry month, only used our rain-ponchos a couple of times.
If you start in October you'll be heading for the cold season towards the end of your walk. November is unpredictable and for the last few years there was snow in the high places.
Whichever month you choose, hope you have a great walk.

I agree, walked Le Puy route in September it was magic, warm, still good for daylight hours, lots of harvest of fruit and hardly any rain, in October apparently it can get cold and dark suddenly. Gitti

I started on Sept 5th, 2009 from SJPdP and it was mostly warm and dry for the first 3 (ish) weeks. The last week (first week of Oct) was cooler and wetter. In my opinion, it is a great time to walk the Camino.
Bill