Average Temperatures for Switzerland in September

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
Reference

Swiss federal authorities. Federal Office of Meteorology and Climatology MeteoSwiss. Normal values per measured parameter.

Switzerland Temperatures
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