weather chart vs weather map

weather chart and weather map both are nouns.

Word	Noun	Adjective	Verb	Adverb
weather chart	Yes	No	No	No
weather map	Yes	No	No	No

As nouns, weather chart and weather map are synonyms defined as:

weather chart and weather map: (meteorology) a map showing the principal meteorological elements at a given time and over an extended region

weather chart (noun)	weather map (noun)
(meteorology) a map showing the principal meteorological elements at a given time and over an extended region	(meteorology) a map showing the principal meteorological elements at a given time and over an extended region