The 1,800 m elevation is about right for the higher peaks in the Dolomites. Bolzano is more like 260 m. More significantly, it's in a valley almost surrounded by mountains. That effectively keeps the air pretty still and traps the heat (I just looked up the temps: average high in August is 29 C, with recorded highs of over 36 C) and humidity, which averages about 80% in summer. I'd think it's entirely possible to be uncomfortable in those conditions without being a scorn-worthy wimp.