September weather forecast
Switzerland

September in Switzerland signifies the onset of autumn, and with it comes a noticeable shift in the climate. In the Central Plateau, encompassing cities such as Zurich and Bern, temperatures start to cool, typically ranging from 12°C (53.6°F) to 25°C (77°F). This milder weather provides a refreshing escape from the intensity of summer, making outdoor excursions increasingly pleasant.

In regions like the Jura and the Alps, the landscape begins its transformative journey. The verdant meadows gradually adopt autumnal hues, creating a picturesque tapestry of reds, oranges, and yellows. While the higher altitudes of these regions might witness the early signs of winter snow towards the end of the month, the Central Plateau predominantly receives rainfall, with levels fluctuating between 813mm (32.01") and 1321mm (52.01"). The days, though gradually shortening, still boast a considerable amount of sunlight, making sightseeing and nature walks a delightful pursuit.

Rain in September can be sporadic, with some showers ushering in cooler air, hinting at the imminent winter. The diminishing intensity of humidity offers a crispness to the air, particularly in the mornings and evenings. The Fohn winds, if they emerge, can still bring with them warmer conditions, contrasting with the generally cooler trend of the month. As a transitional period, September offers visitors a harmonious blend of the residual warmth of summer and the initial chill of autumn, making it a captivating time to explore Switzerland's diverse terrains and climates.

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• Zürich - September »
  On the last day of September, in Zürich sunrise is at 07:24 and sunset at 19:07 CEST. On the first day of September in Zürich, sunrise is at 06:45 and sunset at 20:05.
• Geneva - September »
  In Geneva, Switzerland, during September, the rain falls for 8.1 days and regularly aggregates up to 100mm (3.94") of precipitation. In Geneva, during September, the rain falls for 8.1 days and regularly aggregates up to 100mm (3.94") of precipitation.
• Basel - September »
  In Basel in September, during 8.8 rainfall days, 78mm (3.07") of precipitation is typically accumulated. In Basel in September, it is raining for 8.8 days, with typically 78mm (3.07") of accumulated precipitation.
• Lausanne - September »
  The month with the least rainfall in Lausanne is September, when the rain falls for 12.5 days and typically collects 38mm (1.5") of precipitation. In Lausanne, Switzerland, during September, the rain falls for 12.5 days and regularly aggregates up to 38mm (1.5") of precipitation.
• Bern - September »
  On the first day of September in Bern, Switzerland, sunrise is at 06:50 and sunset at 20:09. On the first day of September in Bern sunrise is at 06:50 and sunset at 20:09.
• Winterthur - September »
  In Winterthur snow does not fall in June through September. Winterthur observes a small decrease in the average high-temperature with the arrival of September, falling from August's warm 24.4°C (75.9°F) to a comfortable 19.6°C (67.3°F).
• Lucerne - September »
  In Lucerne during September, the rain falls for 10.2 days and regularly aggregates up to 107mm (4.21") of precipitation. In September, in Lucerne the rain falls for 10.2 days.
• Lugano - September »
  On the first day of September in Lugano sunrise is at 06:45 and sunset at 20:02. On the last day of September, in Lugano, sunrise is at 07:21 and sunset at 19:06 CEST.
• Biel/Bienne - September »
  In Biel/Bienne, Switzerland, during September, the rain falls for 8.8 days and regularly aggregates up to 97mm (3.82") of precipitation. On the first day of September in Biel/Bienne, sunrise is at 06:49 and sunset at 20:12.
• Thun - September »
  The month of September initiates the season of fall in Thun with notable changes in weather patterns. In Thun, in September, it is raining for 15.9 days, with typically 53mm (2.09") of accumulated precipitation.
• Köniz - September »
  The month with the least rainfall in Köniz is September, when the rain falls for 11.5 days and typically collects 23mm (0.91") of precipitation. In the month of September, the average temperature in Köniz, Switzerland, dips to a chilly 7.5°C (45.5°F) during the night.
• La Chaux-de-Fonds - September »
  In La Chaux-de-Fonds, Switzerland, in September, during 10.6 rainfall days, 128mm (5.04") of precipitation is typically accumulated. In La Chaux-de-Fonds, Switzerland, snow does not fall in July through September.