Mountain passes in Switzerland / Italy

[cay]

I'm thinking of doing a trip around Zurich / St Moritz starting September 19 th ( for 1 week ).

Does anyone know if all the high mountain passes are open that time of year ( Klausen, Grimsel, Furka and Stelvio ) ?

Most sites seems to say they are open until mid October but I wondered if anyone has first hand experience.

Obviously it can vary from year to year but I'm wondering if I will be too late, unfortunately I can't go any sooner.

[Allyc85]

I did Stelvio around that time a couple years ago. It is pot luck though!

[Janosh]

They should all be open around them, but if any, it'll be the Stelvio that's most likely to be closed as it's the highest...

The Andermatt loop is much better driving anyway, so hopefully you'll have nice weather and enjoy the emptyish roads at that time of year!