Over 90 is too hot man.. The ideal temperature during light hours is 68 to 78 degrees Fahrenheit.
Thats so funny how many people use those same thermometers! I would try to get it around 81 if your vegging and have lights on otherwise if your in flower try and get it down to 78 at lights on and around 72 with lights off!
Humidity seems to be great at around 30-55% in veg and at 21% in flower to keep from molding buds.
Hope that helps you!
anyone?????