Do you want an inside look at just how short summer is at higher altitudes? True summer lasts here maybe 6 weeks. In mid August it has already begun to cool at 6000+ ft above sea level.
Certainly it’s not cold yet, but the early mornings are no longer short-sleeve comfortable. And some evenings we have begun to close off our screened interface with the outside before 9 p.m., even though the house still warms up in late afternoon as the setting sun hits our windows.