YOU SAID:
When it rains, my legs hurt
INTO JAPANESE
雨が降ると足が痛い
BACK INTO ENGLISH
It's raining and my feet hurt
INTO JAPANESE
雨が降っていると足が痛い
BACK INTO ENGLISH
It is raining and my feet hurt
INTO JAPANESE
雨が降っていると足が痛い
BACK INTO ENGLISH
It is raining and my feet hurt
That didn't even make that much sense in English.