What is a normal cpu temperature for a MacBook Pro (13-inch, Late 2011)? Problem with temperature on this mac:

MacBook Pro (13-inch, Late 2011)MacBook Pro (13-inch, Late 2011)
2.4 GHz Intel Core i5
16 GB 1333 MHz DDR3
Intel HD Graphics 3000 512 MB


Now I have temperature about 80-100C in 90% of time (without load temperature about 65-70C). I think maybe problem with thermal paste and heatsink.

Before I install Yosemite 10.10 temperature was aroud 60-70 (except youtube videos or some heavy work like video editing and similar).

I tried to disable coherence, reset smc and nvram but without any changes, temperature high even on simple tasks like browsing or work in simpe apps like text editor.

How can I try to prevent overheating or it's a normal temperature for this types of cpu/macbooks?

Cooler works, system show from 4000 to 6200 rpm (that is noisy).

PS. After some observation found that WindowServer with enabled transparency load up to 60% of cpu (and sometimes more), without transparency about 12-40%. So I guess maybe WindowsServer main problem.
I do not know if iStat works well with Yosemite and delivering correct results.

Your CPU temp is on very high end indicating full load of CPU = continuous load of >100%.

Your SMC reset might not have worked so try it again.

Intel made a simple tool that correctly reports CPU load.

A 2011 model should not have a Thermal paste issue, those usually occur after 5 Years (if), and when the conductive paste dries up. 
But if you consider doing something about it, it is in the difficult category to do it your self.

Intel Power Gadget.