Overheating question: is that normal?

Hello!

I'm using Z3+ with latest firmware on it (downloaded it with wi-fi). I've mentioned terrible thing, as i suppose. When I browse internet, and watch youtube while charging the phone, the average processor temperature is 55-60, but it sometimes rises to 76 and than drops down.

Tell me please, is that normal temperature for the phone processor? Won't it harm the processor or another phone components?


Thanks!