At 107 ambient, it's normal operation. All cars do the same thing. Just that most cars, particularly Japanese models, have an "idiot guage" that points dead center for every engine temperature from just above cold to just below boiling over, and people have become conditioned by such things.

Think about all the variables which influence the rate at which heat is added to and removed from the cooling system. Added heat is proportional to how much throttle is being used. Removed heat is influenced by airflow over the radiator (ie vehicle speed) and coolant flow, which is proportional to engine RPM. Only if you could keep all these factors in relation, then engine temp would remain constant.