No real need here. We do get a little HOT weather, but little enough that opening all doors and windows and running fans in strategic spots to move the air does the trick -- and even when the day is stinky hot, it cools off pretty well at night.
ABSOLUTELY! The heat index was over 110 yesterday and the humidity makes it hard to breath. No one but no one buys a house here without central heat and air unless they're totally hard core or super-duper short on cash.