I am assuming you are talking about the CPU Die?
For my 2012 2.6GHz
97-100ºC (207-212ºF) at 100% CPU (e.g. Handbrake). Depends on the ambient temp. It is fairly warm where I am usually. If the room is cold is can run lower temps at peak CPU.
50-60ºC (122-140ºF) at idle.
I wish you North Americans would sort out your horrid imperial measurement system. You need to catch up with the world.
The temp issue has been covered in many threads. There was a few huge threads on this around December 2012 if you want to check. The mini easily handles these temps. The max temp on the 2012 i7 quad's CPU is 105ºC. I have run the mini a few times at 100ºc for 24+ hours. All good.
Having said that, I also run Tuniq TX-4 thermal paste and sit the mini in a Newer Tech side stand.
Stay cool.