In response to the original question...Yes, I drop bow poundage when the weather gets really cold. In ND, that can happen pretty early in the year. When I am dressed in multiple layers of clothing and have been sitting 2-4 hours waiting for a shot, it has been much easier for me to draw a bow that is 5# lighter than the bows I typically hunt with. On deer sized game with well-tuned arrows, they work just as well as the heavier bows. Plus, I have the added confidence of knowing that I can draw them effortlessly when my body is stiff and chilled.
Claudia