The clone retains the characteristics of the parent including the same time clock so, if the parent is finished in 65 days the clone will finish at the same time as the parent. In other words, you will wind up with a dwarf bud.
Autos can take cold nights, 5c is still above freezing so there's no problem. They can even take the occasional freeze, they just won't get as big since cold weather will slow any plants growth.