YOU SAID:

its raining cats and dogs out!

INTO JAPANESE

雨が降って犬も猫も出て行きます！

BACK INTO ENGLISH

It's raining and the dogs and cats are out!

INTO JAPANESE

雨が降っているので犬と猫は外に出ています。

BACK INTO ENGLISH

The dog and cat are outside because it is raining.

INTO JAPANESE

雨が降っているので犬と猫は外に出ています。

BACK INTO ENGLISH

The dog and cat are outside because it is raining.