Hey Smoke,I would say alot depends on where you are at.Certain parts of the state have a longer season than others.I knew someone up by Bellingham that had serious mold set in almost overnight in mid Sept.a few years ago.Night time temps in the upper 40s and rain.Get something that finishes early unless you are more inland,but that has its own set of problems,mostly any cover at all.Take care and be well,and most of all be safe.