September Temperatures in Switzerland

Average temperatures for September at cities throughout Switzerland are listed below in degrees Celsius and Fahrenheit.

The tables give the normals for maximum and minimum monthly temperatures based on weather data collected from 1991 to 2020.

Western Switzerland

This section covers the mainly French speaking portion of Switzerland. It includes the area around Lake Geneva and the cantons of Fribourg, Geneva, Jura, Neuchâtel, Valais and Vaud.

Some of the weather stations are at high elevations in the Valais (or Pennine) Alps of southwestern Switzerland. Great St. Bernard Pass (Col du Grand St-Bernard) is the highest point on this list at 2472 metres (8110 feet). Also above 1400 metres (or 4600 feet) are Chasseral mountain and the resort towns of Zermatt and Montana.

Average September temperatures
High °F	Low °F	Place	High °C	Low °C
53	43	Chasseral	12	6
46	36	Great St Bernard Pass	8	2
57	42	Evolène	14	5
66	48	Fribourg	19	9
70	51	Geneva (Genève)	21	11
60	44	Grächen	16	7
62	44	La Chaux-de-Fonds	17	7
61	44	Montana	16	7
68	53	Neuchâel (Neuenburg)	20	12
68	52	Nyon	20	11
68	49	Payerne	20	10
68	55	Lausanne	20	13
72	51	Sion (Sitten)	22	10
60	41	Zermatt	15	5

Central & Northern Switzerland

Most places on this list are below 1000 metres (3280 feet) elevation where the weather is relatively mild. A little cooler are the ski resort villages of Adelboden in the Bernese Oberland and Engelberg in Obwalden canton.

The sites here with the coldest weather are two mountain peaks. Säntis, near Schwägalp, at 2502 metres (8209 feet) elevation is the highest point in the Appenzell Alps.

Even higher is the weather station at 3580 metres (11,745 feet), above Jungfraujoch pass of the Bernese Alps, a spot known as the "Top of Europe".

Average daily temperatures in September
High °F	Low °F	Place	High °C	Low °C
60	44	Adelboden	16	7
69	52	Basel	21	11
67	49	Bern (Bären)	19	9
68	50	Aarau	20	10
61	45	Engelberg	16	7
49	37	Gütsch	9	3
67	51	Güttingen	19	10
67	50	Interlaken	19	10
33	24	Jungfraujoch	1	-5
67	51	Lucerne (Luzern)	20	11
49	39	Mount Pilatus	10	4
43	34	Säntis	6	1
67	50	Schaffhausen	20	10
62	50	St. Gallen	17	10
66	52	Wädenswil	19	11
66	51	Zürich	19	11

Eastern Switzerland

This list includes two low-elevation cities, Locarno and Lugano, in the canton of Ticino of south-east Switzerland.

Several places here in the canton of Graubünden are mountain resort towns, including Davos, Scuol and Samedan, which sit above 1500 metres (4921 feet) elevation.

High-altitude locations include Gütsch located above Andermatt at 2286 m. On Weissfluhjoch, a peak in the Plessur Range above Davos, weather is reported from just below the summit, at 2690 metres (8825 feet) elevation. On Piz Corvatsch, near Silvaplana in the Bernina Range, the weather is measured at 3305 metres (10,843 feet).

September temperatures: daily averages
High °F	Low °F	Place	High °C	Low °C
53	40	Arosa	12	5
69	51	Chur	20	11
57	46	Cimetta	14	8
58	39	Davos	14	4
62	46	Disentis (Mustér)	17	8
65	50	Glarus	19	10
72	57	Locarno	22	14
72	58	Lugano	22	14
35	27	Piz Corvatsch	2	-3
56	41	San Bernardino	13	5
58	34	Samedan	15	1
65	42	Scuol	18	6
73	53	Stabio	23	11
44	33	Weissfluhjoch	7	1

Average Temperatures for Switzerland in September

Western Switzerland

Central & Northern Switzerland

Eastern Switzerland

Reference

More on Weather in Switzerland