tempFolder in Azure for storing sitemap.xml files

It is recommended to keep the temp folder inside the website root. This is the default location.

It's set in Sitecore.Settings.Azure.config

<sc.variable name="tempFolder" value="/temp"/> 

protected string FilePath

        {

            get

            {

                string path = Path.Combine(TempFolder.Folder, "sitemap-" + this.CurrentSite.Name + ".xml");

                Log.Info("Sitemap xml path: " + path, this);

                return path;

            }

        }