Yes the extreme cold weather can make it difficult if not impossible to pull back heavy poundage after setting in the cold for a period of time.

Over the years I have reduced my huntiong poundage from 78 to 60 lbs. or less.

Once while archery hunting in IL during sub zero tempentures I got bored and stood up to pull my bow back and discovered I could not pull it back no matter how hard I tried (65#) even though I could shoot a 100 rounds back in the Summer.

Now I check how my pull during cold mornings and evening as the season goes on to determine if I need to a reduction in weight and sight changes. On cold days I often wonder how many archery hunter are setting in the woods with those heavy pound set ups not knowing they will have a very difficult time at the moment of truth.