I see what you are saying, however most if not all owner's manuals have a ambient temperature / Oil viscosity chart recommending thicker oil in summer time.
I have a same route I take many times and yesterday was 91F and my oil temp was about 12F higher than the same route when ambient temp is 64F. This is based on my records taking the same route and with pretty much same (no) traffic, same speed/rpm, etc.
Each engine is different and it's not a one-to-one correspondence but in my case 27F increase in ambient temperature resulted in 12F increase in oil temperature.
There is a reason there are all these recommended engine oil viscosity / temperature charts!
It is "based on science, not emotions!"