Question about the Alps

I would say that advice to keep things flexible is directed in particular to people who have scheduled one particular day to go up the Jungfraujoch, or the Schilthorn, where the views are the main purpose. That can be subverted, just as you found with Denali. (I hope you had a great experience anyway; the wildlife and amazing park scenery are still there even when Denali is not out). Our trips to Switzerland and Chamonix have extended over 10 days to 2 weeks, like yours, and in each case we have had a mix of weather, but generally at least 75% clear days. Specifically in late June/early July (2007 trip), we arrived on a rainy day but it cleared the following day. Then we had a pattern of two-three good days, one of rain, throughout the trip from Wengen/Mürren (all good) to Kandersteg (drizzle and clouds) to Zermatt (arrived in drizzle, it cleared but we were caught in a blizzard the next day; then two glorious days of sun) to Gstaad (rain again). Of course this year could be different. The key to visiting the mountains is to be ready with rain gear if you want to do some hiking, and make your plans for riding lifts day to day, depending on the weather. (We had a full week in Chamonix in 2005, but that was later in the summer, like late July. Five beautiful sunny days, then rain, then sun again on the day we had to leave. . .)

I concur with Lola!! We all wish you great weather during your trip, that's what keeps us going there and having such fond memories that we will carry to our graves.

June and July are overall really good weather times of the year. We have been in Lauterbrunnen twice in early July and had great weather both times but that is no guarantee. We actually spent July 4th of 1973 and 2006 on top of the Schilthorn in conditions that are best described as severe clear but again that was only the luck of the draw. I'm glad to see you are traveling by car as it will give you great flexibility to see the area. Don't forget your autobahn vignette in Switzerland. Also in Austria you will need one of their autobahn vignettes as well as an IDP.

June and July are not necessarily the absolute best time of year for hiking (that would be September), but still pretty good. I frequently use the word "flexible" to mean, "Give yourself at least two full days in each Alpine location, and have a plan for days when the weather interferes with outdoor activities." The only caveat I'll give is that snow may still linger on the hiking trails at some higher elevations this year, because of the colder than normal spring we had. Now, actually predicting the ratio of good to bad days during your visit? Impossible this far out. You could get nearly uninterrupted sunshine for weeks, or you could get on and off rain every day. More likely something in between. PS- Reutte is the least attractive town in a region filled with attractive towns. Stay somewhere else, unless you're a Rick Steves completist.

There is no consistent fog that time of the year. It is likely you'll take mixed weather: some days with gorgeous sunny skies, some days with the occasional high cloud, just a few days with rain or low clouds. My suggestion is to have a list of the most weather-critical sights and rides and climbs and do that on the first possible day. Ex: you are in Lauterbunnen for 3 nights, and your first day there has stunning weather: go to the Jungfrau immediately, don't count on good weather going with you the next days.