Good time to ask that question,
A good part of the country is flat cold outside and in garages where you might find some lone quite gardner tending to his babies. The inside of my garage is steady at 40* deg. and the inside of my box is 74*deg. Problem is when I open the door the cold rushes in and I get nervous that I'm going to damage my grow once I get started, But then I remembered that a long time ago I had one growing out on the patio and it took a temp hit of 35*deg for several hours and it didn't fair to bad out of the deal. Marijuana really is a hardy plant.
You temps sound perfect to me, and like Mutt said humidity that is over 50% makes me start to think I should be doing a hothouse, yeppers (mold) will bite your butt.
smoke in peace
KingKahuuna