Can a rubber plant live outside in the wintertime in New York?
Can a Rubber Plant Live Outside
Certified GKH Gardening Expert
No. Rubber trees are only hardy to 30 F. If it gets colder than 30 F where you live, it should not be planted outside. However, potted plants do enjoy spending summers outdoors.
I think you should consider rubber trees (ficus decora) as hardy to 40 degrees, to be on the safe side.