Its hard to say.. with the closet shut the temps could be rising you know.. I use a $15 rig I picked up at home depot, its the wireless indoor outdoor thermometer, i just put the outdoor part in the grow room and the indoor part on my desk.. little does anyone know when they see me sitting at my desk looking at my indoor outdoor thermo that i am watching my grow room temp

Plus I get to see what the temps do when I am not standing there with the door open.. and as easily as glancing a few inches to the left of my computer screen I can tell you that the temp is currently 81.9F in my grow room