They have had their fair share of 'stormy weather' [=they have had many problems] in their marriage.
They are 'fair-weather' friends. [=they are friends when you are successful but not when you fail]
They had to 'weather' [='get through'] some difficult times in the early years of their marriage.
(..) She seems very resourceful. You're worried. We're asking men to fight with us in the worst winter any of them have ever seen. The weather will be the least of their problem. Many of them will be happy to find a good reason to go home. You question their loyalty? Their loyalty is to Jon. (..)2017 TvShow: Game of Thrones Title: Beyond the Wall Season: 7 Episode 6