The weather was very good with one exception. Mostly 22 - 25 degrees C.
In Pontevedra we had one day with very heavy rain in the morning. In the afternoon the weather became better, only slight rain, which stopped finally.
It looks like I can get by with just a poncho -- my pack has a raincover, so keeping the stuff in it dry shouldn't be a problem. I live in the Pacific Northwest and am comfortable with rain as long as it isn't too cold.