Switzerland in September offers a transitional climate as summer fades into autumn. Expect daytime temperatures typically ranging from 15-20C (59-68F) in lower elevations, including cities like Zurich, Geneva, and Basel. Mountainous regions experience cooler conditions, with temperatures dropping significantly at higher altitudes. Rainfall is moderate throughout the month, occurring intermittently rather than persisting for extended periods.
Understanding the typical climatic conditions during this period is crucial for travelers planning activities such as hiking, sightseeing, or outdoor adventures. The pleasant weather, coupled with fewer crowds compared to the peak summer months, makes September an attractive time to visit. Historically, September has marked the beginning of the harvest season in many Swiss regions, influencing local festivals and traditions. This blend of favorable weather and cultural experiences provides a unique perspective on Swiss life.