I assume that it's not so rare with an English climate. Just get up early/stay up late every full or near full moon when there are risk of showers (virtually every day). The first and only time I saw a full arc I instinctively knew it would be possible five minutes before, and just searched for it. As said above, very beautiful in a 'it's so grey but there are colours as well' trippy sort of way! You got to see one once in your life at least, so brave those winter mornings...
I've seen one at night during a thunderstorm. It was around 3 a.m. and there was lightning striking near the Susquehanna River. The combination of lightning and rain made the rainbow.
In Hawai'i, on the Big Island, Heading out of Kona it is a common thing to see. I have seen a double arc, and It made my grandmother cry. But Night rainbows are nice. (As said 3 times now!)
The same reason there are rainbows in the sky: the rain acts as a prism, which splits the sunlight into it's different colors. http://en.wikipedia.org/wiki/Rainbow http://en.wikipedia.org/wiki/Prism_(optics)
A rainbow is a spectrum.
The colors of the rainbow in order are...RedOrangeYellowGreenBluePurple
Color Me a Rainbow was created in 1987.
There are such thing as rainbow clouds. Circumhorizontal arc.
Night rainbow.
There is no "why" because it's possibl to see a rainbow at night, but rare. The reason is that the source of the colors in the rainbow during the day is the sun, whereas the source at night can only be the moon, which is much less bright, so any rainbow at night would be much less noticeable.
A "Moonbow"
It is a rainbow at night
It is called 'Moonbow' (lunar rainbow).
It goes over the rainbow ")
A dim rainbow can be seen at night anywhere, when the moon is behind you in a clear patch of sky and the air in front of you is loaded with heavy fog or droplets of water after a rain.
if you have enough light and water
LOVe,anonamus New Answer. The Thrase is implying that God will not Allow it to Rain This Day. The Thrase is connected to a religious aspect. If There is a Rainbow is at Night then it implys the nest day will be sunny, If a Rainbow exists in the morning then it implys that it will rain.
somewhere over the rainbow
The rainbow is almost always in the day sky, produced by sunlight. Very rarely, one can appear in the night sky, produced by moonlight.
It means that you are outside, the moon is in a clear patch of sky and probably full, and in the opposite direction from the moon, there is probably the leftovers of a rainshower.