well, what is the relative cpu temperature that is acceptable to cost minimal-no repercussions to the processor?

Using the CPUfreqUI and the Qcpufreq, I checked that the temp regulates from as low as 22-39 (regularly at 30) degrees celcius... as I'm typing now, it's at 25..

as usual, when charging, it's hot, when running many apps, it's usually above 30 but only once have i seen it at the ranges of 38+

I live in the equator and it's a bit cool this time of the year... just wondering what are the acceptable EXACT ranges of temps for the cpu to run smoothly without damaging it