I have friends that have skied it in August.
It was a weird end of the season... on one hand, there was very cold weather and pretty decent snows from April through mid-May. Then there was that obscene record heat like the 3rd week of May, but there were also some very cold shots relatively speaking in there too... we'd go from highs in the 90s to highs in the 50s and then back the other way. That usually meant the high ground was in the 30s or even sub-freezing during those cold shots, but they'd also be 65-85F during the hot times.
To be honest, the piles of snow this year and huge drifts seemed to last just as normal despite the high heat times. There are just so many factors that go into it.
I also think we managed to "average" normal for a long time despite the heat because of the rebound cool shots...it was weird how it evened out until recently when it's flipped decidedly warmer than normal in the means.