Not a RainbowAt this time of year, a colorful arc often appears in the noontime sky. It looks like a rainbow, but it's not. "We saw one during Saturday's June Bug parade in Baldwin, Wisconsin," reports Craig Braymen. "This picture barely does it justice."
At medium latitudes, like much of the USA, the arc is not rare.Typically, it can be seen several times each summer. In contrast, further north in much of Europe the circumhorizon arc is a rarity and impossible to see north of Copenhagen.