2002 CF: 2004 from Paris: 2006 VF: 2007 CF: 2009 Aragones, Ingles, Finisterre: 2011 X 2 on CF: 2013 'Caracoles': 2014 CF and Ingles 'Caracoles":2015 Logrono-Burgos (Hospitalero San Anton): 2016 La Douay to Aosta/San Gimignano to Rome:
When I walked the camino in 2002 it rained every second day! We couldn't take days off so we just followed the advised route for cyclists.
In 2004 we walked for six weeks and had three days of rain altogether (there was a heatwave in Europe that year). The only boggy paths we had were in Galicia where there are lots of subsistence farms with cattle and the mud and dung was a challenge!
You'll be fine! Take each day as it comes - rain or shine.