Let dry and start the finishing coats again. Here in Wisconsin we can have a temp of 85 and a humidity of the same. Nothing wants to dry when its this humid. In conditions like this, allow extra drying time between coats, three or four days if needed. Putting your wood out in the hot sun in high humidity does little good, you are better off putting it in front of an air conditioner.
Some wood takes longer to finish.
I cannot explain why. But if you run into a piece of stubborn wood, just stay with it, it eventually will finish.