A 10 degree difference in ambient temps is a very significant different. I don't think comparing the data is relevant. On my s/c'd E46, I notice a significant difference in power and oil temps in 100 degree weather vrs 80 degree and I'm intercooled with w/a injection. I'm sure your car was badly heat soaked. I don't see how your car cannot get quickly heat soaked in 100 degree weather without an intercooler. My E90 can barely withstand a 20 minute DE session and its NA.
Is that good for your car? I'm sure it isn't good over the long term. I know in the past, ESS has highly recommended an intercooler for cars that are run in hotter climates.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red