Trust me, the wind chill makes a big difference.
It's 5 degrees where I am right now, and when the wind blows, it goes right through you.
Let's put it this way, if you live in New Mexico, and your air conditioning fails, what the worst that can happen? If you live up north, and your furnace doesn't work, then your pipes start to freeze, and then you're in all kinds of trouble.
I know wind can make it suck, wind can make it suck in the heat too.
Actually you can die in the heat just as easily as in the cold. Heat exhaustion, dehydration. Remember all the people that died up north when a big heat wave hit 8 or 9 years ago, remember all the French a couple three years ago. And really heat is probably more dangerous than cold, with cold you have to get a lot further away from out standard body temperature for it to be dangerous than with heat, the highs when over 100 people died around Chicago were only like 101 102, 3 or 4 degrees above normal body temperature, people don’t get hypothermia when it’s 95.