For those who came in April this year they were treated to fantastic weather. We had overseas guests and they really enjoyed themselves during this time. Everything that they wanted to see was open, crowds had not yet begun to arrive.
Here is a news report in English - we had recorded breaking weather - and you can read that last April was beautiful as well. For me, it is one of my favorite times of year here!
This April was not only record-breaking in terms of precipitation.
Instead of rain, the high-pressure weather brought strong breezes and
plenty of sunshine. According to the report, April saw 130-155% of the
average sunshine duration over the 1991-2020 reference period.
https://www.swissinfo.ch/eng/various/lack-of-rain-made-april-a-record-month-in-some-cases/91348521
You might have other reasons for choosing another time of year for your holiday, but I certainly wouldn’t use weather as a deciding factor.