Mine is usually in that range also, in recent years I have been growing White widow, which does fine. I wouldn´t actually call 50% high humidity. Temperature is far more important - all strains will grow in warm climates, others are bred to be more tolerant of cold.
cannabis is a very hardy plant. 75*, 50% humidity might be optimum but it will grow 95% as fast at 91*, 75* humidity. just an example. only problem with humidity is it increases the chance of mold/fungus. still not a huge risk though if other conditions are right, like its not too rainy, etc