Summer is coming! But first, we have the rainy season to look forward to...
「もう夏～～～！！！」＝ summer is here! / It's already summer here! / summer is coming!
「その前に梅雨が来るんだけどね」＝ but first, the rainy season :-( / but first, we have the rainy season to look forward to...
一番良い表現は： 「Summer is coming! But first, we have the rainy season to look forward to...」だと思います＾＾
イギリス 
