'Ne'er cast a clout till May be out'

Felt more like winter today on the harbour...

'Ne'er cast a clout till May be out' is an English proverb. The earliest citation is this version of the rhyme from Dr. Thomas Fuller, Gnomologia, 1732, although it may have existed in word-of-mouth form well before that:

"Leave not off a Clout Till May be out.

.....Just saying