temperateness vs fair weather

temperateness and fair weather both are nouns.

Word	Noun	Adjective	Verb	Adverb
temperateness	Yes	No	No	No
fair weather	Yes	No	No	No

As nouns, temperateness and fair weather are synonyms defined as:

temperateness and fair weather: moderate weather; suitable for outdoor activities

Other synonyms of temperateness include sunshine.

temperateness (noun)	fair weather (noun)
exhibiting restraint imposed on the self	moderate weather; suitable for outdoor activities
moderate weather; suitable for outdoor activities