I run about 80-85 c on warm days here (houston) on those days it is usually 90 to 96 F outside (yes I am running a working A/C), and if you consider the humiduty the 'heat index' temp is 100 to 105 F.

Given that, and that you are driving a bit north of me were it might be a bit cooler, I would suggest you might check you radiator - internal for flow, and clean it externally.

While running at just under 100 C is okay, at your location I would at least run a few checks (never hurts to be forewarned that there may be a problem in the making)...

I could be over reacting, but these are great cars and they need to be looked after. Have you added any water wetter to your radiator? FWIW - Enjoy, but check out the 100 c temp.