This might be of use..
The location of temporary files for Azure Web Apps seems to always be D:\local\Temp. However, the entire D:\local folder is MOUNTED on different places for each web app by Azure.
This means that each web app will see a different D:\local, which is perhaps not too surprising. However, the real trick is that KUDU is by itself running as a separate process and gets its own private D:\local. So you are actually browsing KUDU’s private D:\local and not that of your application.
Someone must have realized this can be a problem in debugging scenarios, so there is way to avoid this: add an app setting with name “WEBSITE_DISABLE_SCM_SEPARATION” and value “true” to your application through the Azure portal.
After the application has restarted then when using KUDU you should be able to see the same D:\local (including temporary files) as your application sees.
You should probably turn off this setting when you are done, as the default separation could be there for a reason.