I have not been to Hawai'i before, but I am also going this November, so have done some research. It does have a higher chance of rainfall that month than most months, but what I've been told is that there really is no bad time to go, probably why it is such a desirable vacation destination! My hairstylist said that when he went in November, it did rain at night, so that everything was slightly damp in the mornings, nice and fresh and clean, and did not rain at all during the day.
Enjoy your trip!