Oh geez, now you have me all nervous thinking the temp has been too high all this time. Its been between 99.5 and 100.3. Its pre-set. When I tweak it a little bit down, it goes too low; stays between 98.5 and 99, so I figure the other was better. I figure those peeps figure its Florida, its 75 degrees out, and its time to hatch and enjoy the weather!