The seasons in New York are not clearly defined. Over the years I noticed that sometimes we did not seem to have a Spring and December would sometimes have days that were like cool summer days.
Here in Slovenia I can clearly see that there was a change in the middle of October from summer to autumn. Though there are the occasional warmer days they still have that autumnal feel.There is of course the colour change on the tree leaves and the snow on the distant mountains that can be viewed from Ljubljana.