もう浴衣の季節です "It's already a season of a yukata."

南九州の5月はすでに初夏です

May in the Southern Kyushu is early summer already.

日本の美しい女性は浴衣の似合う季節になってきました 

Japanese good-looking lady was being a season when you look good in a yukata(Japanese summer kimono).

涼しげで。清楚な感じがします

It seems cool. The feeling that they're neat does.

うなじ(後ろから見る首筋)がとても色っぽい

A nape (the scruff seen from the rear) is very sexy.

暑くなったから浴衣姿で花火遊びもいいですね

Because it became hot, the yukata form is also OK for play of fireworks, isn't it?

いい感じでしょ

It seems good.