sunshine vs weather condition

sunshine and weather condition both are nouns.

Word	Noun	Adjective	Verb	Adverb
sunshine	Yes	No	No	No
weather condition	Yes	No	No	No

As nouns, weather condition is a hypernym of sunshine; that is, weather condition is a word with a broader meaning than sunshine:

sunshine: moderate weather; suitable for outdoor activities
weather condition: the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation

Other hypernyms of sunshine include atmospheric condition, conditions, weather.

sunshine (noun)	weather condition (noun)
the quality of being cheerful and dispelling gloom	the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation
the rays of the sun
moderate weather; suitable for outdoor activities