86 in my is near ideal. In reality, this time of year I am at 84 at night (thermostat is set at 84) and 85 or 86 during the day. I have a ceiling fan running to circulate the air because i have detected up to a five degree temperature difference between the top and bottom of my racks without it. During the summer I rarely drop below 86 and air conditioner kicks on at 89. Eggs should still be in an incubator in my opinion.