I think most buildings are build with an expectation of cold in the winter. Building for warmth would result in burst pipes during winter, when the temperature

I think most buildings are build with an expectation of cold in the winter. Building for warmth would result in burst pipes during winter, when the temperature goes below freezing I might be in for a surprise, but I don't think there has been a year where the temperature has been above 19 degrees for six months of the year. I'm curious if you have a source on that?