There is a strong correlation between rich and good weather. Amsterdam a city being rich for many hundreds years has pretty good weather. almost all milt weather cities are rich. Whereas warm climates are a recipe for poorness
I'd be careful making such statements without data. For example, one could wonder if what you observe is a correlation, but not a causation: cities that are close to the sea are rich, as seas allow easy trade. And cities that are close to the sea have a good climate, obviously.
