More precipitation in winter and for isolated weather events
The precipitation amount varies considerably from year to year – much more so than the annual temperature. This means that long-term and systematic changes in precipitation are much more difficult to identify. As a country-wide average, winter precipitation has increased since measurements began in 1864. In the other seasons, no statistically significant changes in mean precipitation can be identified in Switzerland as a whole. However, heavy precipitation events have become more intense and more frequent. Snowfall is less frequent today, and snow lies for a shorter time in many places than it did in the 1960s.
More sunshine since the 1980s
The Swiss climate monitoring network has also been recording sunshine duration for many decades. Sunshine duration declined in the 20th century and reached its lowest point around 1980. Since then, an increase in sunshine duration has been observed at some locations.