Cold is relative. What is cold in Kentucky might not be in Wyoming. Yesterday it was 20 when I went out, which is about normal for this time of year, and this morning it was 25. I use the chemical warming packets this time of year, and they will keep me comfy until it gets to around zero, and when that happens, I don't like to hunt. I may go out later in the day when it is that cold; no wind days and bright sun are pretty nice even when it is 10 degrees or so.
I'm shooting a 56" bow this season, and I don't notice any discomfort when shooting in cooler weather, but that's just me.