Noun
The quality of being changeable; fickleness; inconstancy; mutability.
Source: Webster's dictionaryTwo things in America are astonishing: the changeableness of most human behavior and the strange stability of certain principles. Men are constantly on the move, but the spirit of humanity seems almost unmoved. Alexis de Tocqueville
Sudden resolutions, like the sudden rise of the mercury in the barometer, indicate little else than the changeableness of the weather. David Hare (dramatist)
the changeableness of the weather Source: Internet