It went from cold and rainy to hot and sunny overnight. First you need the furnace, then you need the air conditioning. In the mornings it is so cold, frost on the ground yet and you turn on the heat. Then in the afternoon it gets so hot in the house, that you either turn on the air conditioning or open all the windows if you have a good breeze. And where we live, there is always wind. A day without wind is very rare.