Switzerland confirms summer 2026 was hottest ever… but it will become the norm

**Switzerland’s 2026 Summer Sets New Temperature Records, Experts Warn of Future Norms**

*Zurich, 3 September 2026* – The Swiss Meteorological Service confirmed that the summer of 2026 was the hottest on record since systematic temperature observations began in 1864. The unprecedented heat was documented across the country, with several locations experiencing record‑breaking numbers of days above 30 °C, days above 35 °C, and “tropical nights” (temperatures remaining above 20 °C after midnight).

Roger Perret, a meteorologist with the private weather‑forecasting firm MeteoNews, said the summer was marked by “exceptionally long heatwaves” and “significantly sunnier than average” conditions. Despite a relatively high frequency of thunderstorms, the season was among the driest on record. In the north‑western part of the country, including the Jura region and large sections of the Swiss Plateau, precipitation fell to less than 50 % of the long‑term average for the season. By contrast, the Geneva region, Valais, Ticino and parts of Graubünden experienced less severe deficits.

Local extremes were also noted. Basel recorded a maximum temperature of 39 °C, the highest ever documented in the city. Other major towns reported sustained temperatures of 30 °C or higher well into the first week of September, with Zurich, Bern, Chur, Schaffhausen, Biasca and Buchs all reaching that threshold on multiple days. Basel recorded 31 °C, while Geneva reached 33 °C during the same period.

Perret cautioned that labeling the summer as “the summer of the century” would be premature, but emphasized that climate change is rapidly altering the baseline for Swiss summers. “Due to rapidly progressing climate change, a summer like this year’s, or even a hotter one, is quite likely in the coming years,” he said. Climate models indicate that a summer with the characteristics of 2026 could become the statistical norm by around 2070.

The observed heatwave aligns with broader scientific consensus that rising global temperatures, driven largely by the combustion of fossil fuels, will increase the frequency, intensity, and duration of heat events worldwide. The 2026 summer joins only two previous Swiss summers—those of 1949 and 1962—as among the driest on record.

The Swiss Federal Office for the Environment (FOEN) has not yet released an official statement on the implications of the 2026 heatwave for water management or public health, but the data underscore the growing challenges posed by a warming climate.

*Source: The Local (Switzerland), 3 September 2026.*

Article and image source: thelocal.ch