Advice of those who have walked May/June

The question was:

I walked the CF from SJPDP to Finisterre in September of 2015. My fiancé and I hiked Porto to Santiago last September. We are planning to do the first 3 weeks of the CF next mid-May into June and since I have no experience with weather for that time of year I wondered if anyone who has walked during that timeframe could give us an idea of weather conditions (of course understanding that every year is different). 
Blessings for any and all info. 

Read all about walking the Camino in May and June here on the forum.