Switzerland in September: where is it warmest?
In September, Lugano is the warmest place with 22 °C by day, Davos the coolest with 13 °C. 36 of 41 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sun | Rain days |
|---|---|---|---|---|
| Lugano | 78 | 22° | 6 h | 10 |
| Locarno | 77 | 22° | 7 h | 11 |
| Bellinzona | 77 | 22° | 7 h | 11 |
| Sion | 73 | 21° | 7 h | 13 |
| Geneva | 75 | 20° | 6 h | 11 |
| Basel | 74 | 20° | 5 h | 10 |
| Montreux | 74 | 20° | 6 h | 12 |
| Baden, Switzerland | 72 | 20° | 5 h | 11 |
| Olten | 71 | 20° | 5 h | 12 |
| Aarau | 70 | 20° | 5 h | 12 |
| Glarus | 62 | 20° | 4 h | 14 |
| Vevey | 75 | 19° | 6 h | 12 |
| Zurich | 73 | 19° | 6 h | 11 |
| Lausanne | 73 | 19° | 6 h | 12 |
| Schaffhausen | 73 | 19° | 5 h | 11 |
| Neuchâtel | 73 | 19° | 6 h | 12 |
| Winterthur | 72 | 19° | 5 h | 11 |
| Biel/Bienne | 72 | 19° | 6 h | 12 |
| Interlaken | 71 | 19° | 5 h | 12 |
| Zug | 70 | 19° | 5 h | 12 |
| Solothurn | 70 | 19° | 5 h | 12 |
| Stein am Rhein | 70 | 19° | 5 h | 12 |
| Lucerne | 69 | 19° | 5 h | 12 |
| Frauenfeld | 69 | 19° | 5 h | 12 |
| Chur | 62 | 19° | 5 h | 16 |
| Bern | 73 | 18° | 6 h | 12 |
| Fribourg | 73 | 18° | 6 h | 12 |
| Thun | 71 | 18° | 5 h | 12 |
| Lauterbrunnen | 64 | 18° | 5 h | 15 |
| Grindelwald | 66 | 17° | 5 h | 15 |
| Scuol | 64 | 17° | 6 h | 15 |
| St. Gallen | 63 | 17° | 5 h | 14 |
| Einsiedeln | 63 | 17° | 5 h | 15 |
| La Chaux-de-Fonds | 60 | 17° | 5 h | 13 |
| Gstaad | 66 | 16° | 5 h | 13 |
| Zermatt | 56 | 16° | 5 h | 18 |
| Andermatt | 55 | 15° | 5 h | 16 |
| Crans-Montana | 61 | 14° | 7 h | 14 |
| Arosa | 52 | 13° | 5 h | 13 |
| St. Moritz | 51 | 13° | 5 h | 13 |
| Davos | 51 | 13° | 5 h | 15 |
Switzerland in September: quick answers
Switzerland in September: where is it warmest?
The warmest places in September are Lugano (22 °C), Locarno (22 °C) and Bellinzona (22 °C).
Switzerland in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in Lugano, Locarno and Bellinzona.
Switzerland month by month
Switzerland: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences