September in the Dolomites typically offers a transition from summer to autumn. Expect daytime temperatures ranging from mild to crisp, generally between 10C and 20C (50F and 68F). Nights become noticeably cooler, often dipping below freezing at higher elevations. Sunshine is prevalent, though interspersed with occasional periods of rain or even early snowfall, particularly at higher altitudes. This period experiences fewer crowds compared to the peak summer months.
This time of year presents favorable conditions for a variety of activities. Hiking and climbing become more enjoyable with cooler temperatures, and the changing foliage provides spectacular scenery. The clear, crisp air enhances visibility, making it ideal for photography and sightseeing. The transition period offers a unique blend of summer and autumnal characteristics, making it a special time to visit. Historically, September marks the end of the main tourist season and the beginning of preparations for the winter months in these mountains.