weather and climate are totally different things. climate is always changing.....in that regard they share the same attribute. climate changes over centuries and longer ....weather changes daily and weekly..never confuse the two
So what would make one think they'd work on any time scale? A model is physics-based, or it is algorithmic, non closed-form approximations, manipulations, etc. of empirical data. I contend the empirical data they use is manufactured, filched, cherry picked, etc. and they have no physics based foundation to speak of in short - bullshit.
By equivocating weather vs climate, we excuse the impreciseness of their method and their accuracy, that's all. In the end, at any given instant in their concocted timelines, weather and climate are the same.