Anyway, Lorelei, in autumn it's normal a wet weather in the Camino del Norte. This is the reason why, all the north of Spain is "green" (we call it "La España humeda", the wet Spain) and for example Castilla, Burgos, Palencia, etc, it's "less green".
During the last years weather is crazy, but if you find several rainy days this is normal.
But don't worry! the camino will be yours, no runs for the albergues, people is nice, everything is green, beautiful, food is incredible, and ....
Buen Camino,
Javier Martin
Madrid, Spain.