AP, sounds like you had unusual conditions..two things you can do for those times of extreme high outside temps that affect engine temps as well :
1. add a manual fan override switch and when you see the temps start to rise quicker than normal due to higher ambient outside temps, turn the fans on manually before they come on automatically thereby getting the hot under hood engine bay temps pushing out those front fender vents quicker and for a longer period of time. i use my manual switch on occasion during the woodward ave dream cruise (read crawl) or during extreme high outside temps, which are infrequent in motown compared to other locales .
2. some folks add rubber to the bottom of the two levers that lock your hood closed, maybe 1/2 or 3/4 inch. ie, the two flat pieces that normally catch / lock under the fixed plates in the engine bay. then you can turn the levers so that when the hood is closed the rubber sits on top of the two plates mounted on the body, thereby creating a wedge opening effect at the back ( winshield side) of the hood. ie, you are not locking the hood then, but creating an opening. this allows considerable hot air out of the engine bay as it escapes thru the created venting . the hood sits up near the windshield 1/2 inch or so. some folks have designed a rubber or some other material wedge to put between the body and the hood . these are usually used by folks who do parade driving or have heavy traffic/ slow moving traffic/frequent high outside temps.
remember , these gauges aren't always 100% accurate either, and i find they tend to read on the 'high side', ie, 100 degrees C on the gauge is perhaps 97-98 C in actuality. you can take various engine location heat readings using the $100 or so infra red heat guns to see what various parts of your engine are temp wise. also, remember, the typical 50/50 anti freeze/ water ratio provides a boiling temp of about 235 degrees F, so 100 degrees C = 212 degrees F (normal boiling temp w/o
antifreeze or other additives) . therefor you still have a margin of error. the
oil reading being 100-105 C is not as critical as your water temps being near the 235 degree F range reading.
if your engine is unique and it runs hotter than similar counterpart engines, there are also some water additive products that reduce the water temps by 8-12 degrees F...one is Redline Water Wetter and another that reduces the temps more is a DUI product ( not sure on the exact product name...partialzheimers setting in, old age moment). both are used by lots of the racer folks and are good for street use. check your local performance auto supply stores or online.
if it aint puking fluid, it is not too hot is one way to look at it. sounds like your temps are ok except for extreme conditions that you do not regularly encounter.
keep cool. bill