You could bump both extremes a tad bit. Here in Vegas mine routinely hit 84F for a few hours during the hottest part of the day and only drop to about 79F for a low with no Ill effects. Humidities run 50-60% and always have perfect sheds. I like to keep mine a bit on the lower end of the generally accepted humidity range so when I begin cycling and ramp up the humidity the change is more profound.

Bill