I'm at similar latitude as you, and I had plants finishing as early as late August, to as late as first week of November. I definitely learned a lot. This late summer/fall was pretty mild, but my October/November finishers definitely saw a few bouts of heavy wind and rain.
Plant selection seems to be key. I had fat indicas (Bodhi Cherry Hashplant and Goji OG) finishing first week of October that got maybe 5-10% rot/mold, then I had sativas (KC Brains KC33 and Mango) harvested early November with maybe 1% rot/mold.
Going forward, it looks like PNW growing requires one or both of:
-hardy sativas with fluffy buds, in which case (it seems) an early harvest isn't necessary
-beat the rains (late September most years)
If you want early, look at Hybrids from Hell. Monk, Danish Gold, and Super07 finished by September 1 for me. Amnesia x Hashplant2 and Polish Demon finished early October, with minimal rot or mold.
Plant selection seems to be key. I had fat indicas (Bodhi Cherry Hashplant and Goji OG) finishing first week of October that got maybe 5-10% rot/mold, then I had sativas (KC Brains KC33 and Mango) harvested early November with maybe 1% rot/mold.
Going forward, it looks like PNW growing requires one or both of:
-hardy sativas with fluffy buds, in which case (it seems) an early harvest isn't necessary
-beat the rains (late September most years)
If you want early, look at Hybrids from Hell. Monk, Danish Gold, and Super07 finished by September 1 for me. Amnesia x Hashplant2 and Polish Demon finished early October, with minimal rot or mold.