Saying humidity is the reason for condensation in the windows is not valid, in my experience.
We lived in an old farmhouse that had old windows - we felt the air through them. Windows had so much condensation on them, the water on the inside of the windows froze in winter. We replaced those old windows with double pane windows (made by a very reputable manufacturer) and never saw that water in the windows again. House was a lot warmer, too.
In our current house, we have two huge double pane windows - each 90" wide separated in two by a strip of wood. Well, one of those window panes broke. We replaced it, but with one pane instead of two. We keep getting condensation in that window pane but the other window that's double is just fine. Explainable?