"But my memory of it is sunlight clear for it seems I never saw it in that November which, I am told, comes to the mildest cities."
-> sun = powerful force - nothing can change her perfect view of the city.
-> "told" creates a sense separation between what she believes and what she has been told by others.
-> "November" is late Autumn/Winter which can signify she never saw it in a dark, cold light and her memories are only positive.
-> "mildest city" - disaster can strike in any place, even if they don't deserve it.
-> memories are a metaphor- has connotations of happiness as the speakers memories bring comfort.