Sunshower

A sunshower or sun shower is a meteorological phenomenon in which rain falls while the sun is shining. A sunshower is usually the result of accompanying winds associated with a rain storm sometimes miles away, blowing the airborne raindrops into an area where there are no clouds. Hence, a sunshower. Sometimes a sunshower is created when a single rain cloud passes overhead, and the Sun's angle keeps the sunlight from being obstructed by overhead clouds.

Sunshower conditions often lead to the appearance of a rainbow, if the sun is at a low enough angle. Although used in the United States, Canada, Australia, New Zealand, Ireland and the UK, the term "sunshower" is rarely found in dictionaries. Additionally, the phenomenon has a wide range of sometimes remarkably similar folkloric names in cultures around the world. A common theme is that of clever animals and tricksters getting married or related to the devil, although many variations of this theme are in existence.

In the United States, particularly in the Southern United States, and in Hungary as well, a sunshower is said to show that "the devil is beating his wife" (or, more rarely, "the devil is beating his wife with a walking stick") because he is angry God created a beautiful day. The rain is said to be his wife's tears. A regional variant from Tennessee is "the devil is kissing his wife". In French, the phrase is "Le diable bat sa femme et marie sa fille" (i.e., "the devil is beating his wife and marrying his daughter"). In the Netherlands and Belgium, they say that there is a "funfair going on in hell". In St. Kitts and Nevis, when rain is falling and the sun is shining, it is said that 'D devil a bang he wife'. In Liberia, it is said that "the devil is fighting with his wife over a chicken bone."

...
Wikipedia