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.
(..) throne slaughter each other. An when they're one, seize Winterfell from whichever thief survives. Winterfell is miles away from here. The weather has alreay begun to turn. That is why it is critical to strike soon while the victor still licks his wouns. (..)2015 TvShow: Game of Thrones Title: Unbowed, Unbent, Unbroken Season: 5 Episode 6