@Carrie, exactly! The opening dates for gondolas and such are fixed, opening dates for trails are weather dependant. The Panorama trail is often not open until the second half of June, in my experience.
@Wanderweg, your advice was that @terry.west should reverse the order that they planned for their trip so that they could have better weather in the mountains
- Reverse the order
In the mountains, spring doesn’t improve day by day in a smooth way. May 8 is not automatically better than May 7, and so on.
What usually happens is a general move toward spring over weeks, not days, with warm periods mixed with colder ones. In early to mid-May it’s common to have snow melting one week and then new snow falling the next, especially at higher elevations.
So while the second week of May can sometimes be better than the first, a difference of just one week doesn’t guarantee better weather or clearer trails. Conditions can easily go either way.
Incidentally Wanderweg, I have seen you say that you spend your summers in Mürren, I didn't realise you were here in May also.
@terry.west May is not off season, but rather shoulder season, you will still find a lot of things open and in fact it is one of my very favourite times of year here in Switzerland, lots of beauty but still very few tourists!
I have lived in Switzerland for over eight years now, and even during the 20+ years before that, we always came here for our family holidays in May. There is more than enough to do, spring is in full swing at lower elevations and the mountains still look absolutely amazing in the crisp air - summer is often very hazy and the experience is not quite the same.