The climate in Switzerland

Average daytime and nighttime temperatures

All climatic diagrams of this page are taken from the collected data from 56 measuring stations in Switzerland.
Weather stations at an altitude above 2490m have not been included.
All data correspond to the average monthly values of the last 20 years.

Back to overview: Switzerland

Climate zone: Moderate zone of the northern hemisphere

The climate in Switzerland is much more unsettled than in central Europe and offers varied seasons with deep winters and warm summers. It rarely gets really warm here and you can safely leave your swimwear at home. Due to the warmer temperatures the best time for traveling is from June to September. Winter athletes will find their favorite weather conditions from December to January.

Duration of daylight and sunshine in Switzerland

hours of sunshine per daySunshine hours per day in Switzerland
rainy days per monthRainy days per month in Switzerland
Precipitation in mm/dayPrecipitation in Switzerland
Water temperatureWater temperatures in Switzerland
Relative humidity in %Relative humidity in Switzerland
Absolute humidity in g/m³ (approx.)Absolute humidity in Switzerland

Temperature records of the last 72 years

The hottest temperature measured from 1949 to June 2021 was reported by the Geneve Airp weather station. In July 2015 the record temperature of 39.7 °C was reported here. The hottest summer from July to September, based on all 8 weather stations in Switzerland below 2490 metres altitude, was recorded in 1949 with an average temperature of 20.5 °C. This average temperature will normally be measured every 4 to 6 hours, thus also including the nights. Normally, this value is 18.4 degrees Celsius.

The coldest day in these 72 years was reported by the weather station Basel Binningen. Here the temperature dropped to -19.3 °C in February 2012. Basel Binningen lies at an altitude of 317 meters above sea level. The coldest winter (January to March) was in 1963 with an average temperature of 0.1 °C. In Switzerland, it is usual to have about 3.5 degrees more at 3.6 °C for this three-month period.

The most precipitation fell in November 2014. With 19.6 mm per day, the Lugano weather station recorded the highest monthly average of the last 72 years. Incidentally, the region with the most rainfall for the whole year is around Lugano. The driest region is near Sion.

Long-term development of temperatures from 1950 - 2020

In contrast to single record values, a long-term development cannot simply be brought about by all weather stations in the country. Both the number and the locations are constantly changing. A simply calculated average value would give a falsified result. If several measuring stations in particularly cold mountain or coastal regions are added in one year, the average would already decrease as a result of this alone. If a station fails during the summer or winter months, it does not provide any values and falsifies the average again. The subsequent long-term development was therefore reduced to only 1 measuring points in order to have actually comparable data over as long a period as possible.

In the years 1950 to 2020 there were only these 1 weather stations in the whole country, which reported continuous temperature values (Zuerich Fluntern). From these weather reports we have created a long-term development that shows the monthly average temperatures. The hottest month in this entire period was 2003 with 22.7 °C. 1956 was the coldest month with an average temperature of -8.7 °C.

The average annual temperature was about 9.1 °C in the years after 1950 and about 10.5 °C in the last years before 2020. So in less than 71 years it has increased by about 1.5 °C. This trend only applies to the selected 1 weather stations in Switzerland. A considerably more comprehensive evaluation of the global warming has been provided separately.

Long-term development of temperatures in Switzerland

More detailed information on global warming with a view by continent can also be found on our topic page on climate change. Data basis: German Weather Service, individual values averaged and supplemented by own elements.