Human life is full of unpredictable turns; man's fate is as changeable as the weather. Often used alongside [[天有不测风云|天有不測風雲|tian1 you3 bu4 ce4 feng1 yun2]] to emphasize that misfortune can strike at any moment.

Fortune is as unpredictable as the weather, and every day may bring luck or disaster; used to express that something unexpected may happen at any moment.