Interlaken, Switzerland, experiences a transition in climate during September. Summer’s warmth begins to fade, giving way to cooler autumnal temperatures. Average highs typically range from 15C to 20C (59F to 68F), while overnight lows can dip to between 7C and 12C (45F to 54F). Rainfall becomes more frequent compared to the drier summer months, with an average of around 100mm spread throughout the month. The surrounding mountains may experience their first dustings of snow at higher elevations.
This shift in weather patterns presents unique opportunities for visitors. The pleasant daytime temperatures are ideal for hiking and exploring the region’s stunning landscapes without the summer crowds. The crisp, clear air often provides breathtaking views of the Jungfrau massif and surrounding peaks. Moreover, the changing foliage begins to display the vibrant hues of autumn, adding a touch of seasonal beauty to the alpine scenery. Historically, September marked the end of the primary tourist season, allowing for a more tranquil experience.
