Hello Pablo,
In 2002 I walked the camino from 16th May to 15th June. It was cool in the high places but warm on the plains.
In 2004 I walked in June and there were heatwaves in Europe with the worst fires in 10 years in Galicia. We had one day of rain in 6 weeks - none at all in Galicia.
This year summer was late coming, it snowed until the end of April and was cold, wet and muddy until well into July.
I walked in September this year and besides three days of rain at the start of our walk, we had only an occasional early morning shower at Manajrin and Santiago.
I agree with Johnnie - I don't think you can compare the weather year by year anymore. I think we have to choose a time and endure whatever mother nature serves up!
Take your wife in May - you two won't be disappointed. The days are much longer so you can have an earlier start with sunrise in mid-May at about 7am (almost 1.5 hours earlier than mid-October) and sunsets at 9:30 - two hours later than in October. The wildflowers are quite spectacular. Everything is green with new vines, new wheat, new asparagus, cherries, rasberries, apricots and citrus fruits all in season. And, if you like birding, the large white and black European stork all have fat babies in their huge nests on top of every church tower and steeple. (Listen out for the clapping of the babies beaks!)
Abrazos,
Sil
Check out this website for sunrise and sunset times any month of the year:
http://www.timeanddate.com/worldclock/a ... html?n=141