Winter has not started yet. We deal with celsius and I cannot remember each year what it goes down to. It is cold both inside and out here. You have to have some kind of heating system inside or it will be too cold. I remember I studied Hebrew in the winter and the only heater we had was a small one and it was only in the front. Those that sat in the back were cold. I am a spring and summer person and hate winter. I suffer very much in the winter with my health.