It gets pretty hot in Pennsylvania in summer, but the growing season is short. I have my greenhouse foggers set to keep it under 95F or else it would be >110F inside on sunny warm days. Even in the winter if it is 40F outside but full sun the greenhouse will easily be 80-90F.
I will simply wait and see how the next couple crops turn out. The tree is growing rapidly, it should easily reach the greenhouse roof/fans in the next couple years.