完全可以,但是偏向于书面语言,口语交流不会这样文艺化,口语上要么夏雨,要么冷雨,或者夏天的雨真凉。
absolutely yes, but it's more like writing language rather than oral language.
when you are talking with someone ,you may say" summer rain/ cold rain/ the summer rain is so cold." But ," cool summer rain"sounds like a sentence of a poem,it's really a poetic words