Slow Summer For Butterflies

I have not had any caterpillars this summer. Here in Atlanta, we are just starting to see butterflies and mostly Eastern Yellow Tiger Swallowtails. My family was in the North Georgia Mountains last week and we saw a lot of Tiger Swallowtails and Pipevine or Spicebush Swallowtails. It was encouraging after a disappointing summer. Our area has had a lot of rain this summer with pop thunderstorms almost every afternoon. I don't know of that would affect the butterfly population. I am hoping for Monarchs later this month. We have plenty of the host plant, milkweed. We will see soon enough.