After the meteorological winter at the end of February, measurable amounts of fresh snow (snow cover of 1 cm or more) regularly fall at stations to the north and south of the Alps. Sometimes, the amount of snow that falls can be huge.
A typical example was the weekend of 4th and 5th March 2006, when many places in northwestern, northern and northeastern Switzerland saw between 40 and 50+ cm of fresh snow fall. At several measurement sites, such as those in Basel, Delémont, Zurich and St. Gallen, the highest one-day total of fresh snow in the entire measurement series up to 2020 was recorded on that particular weekend.
This was not the first time massive snowfall events were observed in March. On 11th March 1931 in Bern, for example, there was a blanket of snow measuring 96 cm. This is the highest value in the entire measurement series.
Over the long term, the average number of days with fresh snow on the northern side of the Alps is two to three in March, and one to two in April. Snowfall is rare after the middle of April. The table below shows the dates with the last measurable fresh snowfall of the season. The original data from the period of 1931–2020 have been used.