No. With first nights that are close to 0 degrees, I move them to small glasshouse where the need to turn on the heating is only when it is -4 or more. OR when the north cold wind is blowing.
When I came into this house I didn't know for those differences in climate- near woods and by the asphalt part of town. Although I am still in the same town, here is much higher winter humidity; many cacti that could winter outside there, here cold humidity kills them. Second thing is that cold north wind. When it starts to blow, it can blow for many days and then temperature crush suddenly. I have to turn on that heating immediately, If I am not reacting on time, in the glasshouse it can drop below zero. That is how some plants died to me here.