Might be just you
I dont think the cold will hurt the bow,at least I hope not[8D]
I hunt all day hunts in the -c temps getting as low as -20c plus and my bow will still shoot the same as it would in a indoors heated shop.If the bow isnt performing to its intended task then I know its me.
I agree with the above statement and think the heat would hurt a bow over time more then the cold will