When it rains like it did today, that is when the weather is sunny and raining at the same time, as children we would knowingly nod, ‘Fox and the crow are getting wedded’. This must have been just a comment on the unnaturalness of it being sunny and raining at the same time.
It’s called a sunshower. I Wikipedia it, apparently similar animal wedding sayings exist across the world for this phenomenon. Foxes wedding, Bear’s wedding, elves wedding? Take your pick.