A first for me—a January rainbow! I love my ‘bows as much as I do halos and have captured a variety of them including doubles, redbows, cloudbows and fogbows—both solar and lunar. Winter rainbows aren’t common up here in Alberta, Canada, so this brief appearance of one made my day!
it's (almost always) about the water... 
The rainbow does add even more beauty to your lovely picture. Well done.
You attract the light!