Suppose we have a building in an area with weather conditions $W_t$ at time $t$, and suppose we could change the relative humidity $\phi_t \in W_t$. Would the change in relative humidity $\phi_t$ have effect on some room/office within that building?
I'm making assumptions which can't be made in real situations, and am aware of that. But just solely to get some insights; this question. Isolation? I don't make any assumptions.
(notice that the sun is at the same position during the humidity change, along with the "non-moving" clouds etc.)