
Mozart died at 1 a.m. on 5 December 1791 at the age of 35.
The New Grove gives a matter-of-fact description of his funeral:
Mozart was buried in a common grave, in accordance with contemporary Viennese custom, at the St. Marx Cemetery outside the city on 7 December. If, as later reports say, no mourners attended, that too is consistent with Viennese burial customs at the time; later Jahn (1856) wrote that Salieri, Süssmayr, van Swieten and two other musicians were present. The tale of a storm and snow is false; the day was calm and mild.[66]
Now this is from Wiki.....so it's the latest version.