Red Sky at Night

“Red sky in the morning, sailors take warning.
  Red sky at night, sailor's delight.”

(Picture taken on January 2nd)

By the way, it is almost the same in Italian:

Rosso di sera, bel tempo si spera, rosso di mattina, mal tempo si avvicina.

(Red at night, good weather is hoped, red in the morning, bad weather approaches.)

Versione italiana