I do have cylinders the run a little cooler then then others. But I usually check with the temperature meter. Example, I had 4 cylinders running between 130 F - 145 F ( 55C - 62C) but one cylinder was only at 90F (32C), I found out for some reason that cylinder wasn't firing.
Also, when I ran the engine with a fuel pump it seemed to have more even temps on all cylinders.