With much of the west coast in drought situations a rainbow is certainly a welcome sight. Compare these two rainbow shots of the same hill across the street from us. The first was taken March 31st of this year. Notice how beautifully green the hills are.
It is kind of sprinkling right now and this is the picture of the same area I took just a moment ago. (The tall thinner tree on the right is the same.) Notice how yellow and dry the hill is now.
So it is understandable that the rain, no matter how slight, is a welcome sight.