You have to be able to accurately shoot. So if you are shaking like a leaf on the verge of hypothermia, you won't even be able to shoot a gun, much less a bow. And sometimes a bow will not work right in cold temps so you better test it in cold temps by leaving it outside for a few hours in the cold and then target shooting. Otherwise, I can put up with some cold feet. Coldest I hunted was -8F, from the ground with a gun - I was only out a few hours that morning, but got my deer. Shake hand warmers can really come in handy.