Q: high engine temp

i measure engine temp via OBD2 device. at normal driving it shows 203* to 210* F which is supposed to be around 190F. and fan goes max right on 210F. no error code, coolant level is ok, no leaking, no check engine light. at idle it increases to 205F and when start driving it goes up to 210F at 70MPH or higher. max temp i observed was 216*F driving high hills 60-70MPH.