One of the stupidest threads posted. Bottom line, you like hunting while it’s hot, that’s fine, but I think most people in the country would rather not deer hunt in short pants and flip flops.
I think this is an honest answer. I know most folks really do believe "cold temperature" is some magical switch (I don't), but I've long thought that it was really more of a subconscious association: "Deer hunting / Cold Weather" (This is why folks always say "It 'feels' like deer huntin' weather this weekend!") Most of us are slammin' hamburger steaks and gravy all summer, and it's rough totin' a Budweiser belly through 75 degree woods.
Except for extremes (of which we seldom ever see during hunting season), I do not believe it's temperature. I believe it's the deeper atmospheric conditions that accompany the temperature change. Barometer, humidity, ambience, whatever. Might not have been like this everywhere, but earlier this week around my house it was in the upper 20s and heavy frost. This morning was 25 and no frost, and there were deer everywhere on my commute. It wasn't the temp, it was whatever caused there to be no frost (and we went up in barometric pressure overnight also).
But chit if I really know, it just makes more sense to me.