Noticed my temp gauge climbing a little high in my 2016 SRT 392 lately, when driving in the daytime in Albuquerque, during stop and go city driving. Lately it's been in the high 80's to mid 90's around here. Coolant reservoir level is where it should be, I can't find any leaks anywhere. Water pump and thermostat were replaced around 30-35k miles ago. Could it really just be the ambient temperatures making the coolant temp climb past 215? Or is something else going on here?