In the night, the adult Greek enclosure can drop as little as 65 degrees without the need of problem. For Golden Greeks, it should be somewhat hotter, keeping about 72 degrees even while in the evenings and winters. Whilst Ibera Greeks can hibernate, like Hermann’s tortoise for sale, Golden Greek https://thetortoisehome.com/product/angonoka-tortoise-astrochelys-yniphora/