Humidity is a given all year round. Some days better than others.... As for mid June, we were there for 10 days last June and I only recall it actually raining once, but it was SO WINDY. I don't know if that was a freak occurance, or if that was normal for mid June, but there were three days we couldn't go snorkeling or sailing or fishing because of the wind. But the wind did keep the temp nice and comfortable. We only had AC in our bedroom. The breeze was pleasant. It's warm in June, but not miserable hot like August.