YOU SAID:

I am happy when it rains

INTO JAPANESE

雨が降ると嬉しい

BACK INTO ENGLISH

I hope it rains

INTO JAPANESE

雨が降ればいい

BACK INTO ENGLISH

Good rains

INTO JAPANESE

良い雨

BACK INTO ENGLISH

Good rain

INTO JAPANESE

良い雨

BACK INTO ENGLISH

Good rain