風means wind 雨means rain , both of them could be quite annoying and challenging for a person and for sure it is not a good day I mean the weather, so it is used kind of an idiom and metaphor for the hard times in our life and it is used as a noun . After experiencing those 風風雨雨， it will make a person tougher . hopefully it helps you understand , good day

1 difficulties and hardships 2 ups and downs

①不断地刮风下雨。②比喻困难重重。③比喻议论纷纷

风风雨雨 It's a Chinese word. It means that the wind and rain are constantly blowing and raining; it means that there are many obstacles; it is also a metaphor for the turmoil of the times and the spread of rumors.