I live up in Oregon and we have a similar climate. My 100 year old house was built by someone who really knew what they were doing. My attic gets hot in the summer even though the ambient temp outside is moderate. I have two windows, one at either gable end. When both are opened a nice breeze flows through and keeps it all cool. This is important as I sleep up there. If you can have gable end vents/windows and can create a nice breeze it should work. I hope this helps.