Expect rain if ducks flap their wings repeatedly.
Last 7 Days
If it rains on Easter Day, There shall be good grass but very bad hay.
When the leaves show their under sides, Be very sure that rain betides.
Narrow, horizontal red clouds after sunset in the west indicate rain before thirty-six hours.
The calling of cicadas foretells dry weather and that frost will come in six weeks.
If it rains on St. Anne's Day, it will rain for a month and a week.
If the new moon is not visible before the fourth day, the air will be unsettled for the whole month. -Francis Bacon, English philosopher (1561–1626)
To prevent bad luck, do not step on a cloud reflected in a puddle.