I've gotten lazy & didn't move this palm inside. On several occasions it saw mid forties, 42 low for a couple hours. I did however have it out of the wind. It hasn't skipped a beat. I always heard it would cark under 50. I'm at the point where I either up pot or plant. If potted, it won't fit in my home next winter. I am throwing caution to the wind and planting in a sheltered spot. I will wrap & place microwaveable heated discs inside under 42.