Today was 86F ambient temp and after a nice drive I took a screen shot of one of the Gauges screens.
Arduino was comfortably at around 100, 13 degrees above ambient.
The following screen was after a nice freeway run, about a mile of slow and go traffic after exit and then a minute or so after parking. Note the intake temp shows the results of heat soak as does the Arduino temp, but nothing to worry about.
