Wengen/Jungfrau with kids July vs October?

Laurel just posted this the other day:

https://www.jungfrau.ch/en-gb/live/operating-info/

If you scroll down, it shows the operating dates for the various trains and cable cars.

Some hotels start closing down in Oct. to break before the busy winter season. I see the Wengen hotel I stay at, hotel schonegg. closes on Oct. 13th of next year.

I think I would opt for July/August.

Our grandkids 7 and 10 loved the playgrounds, marble runs and public pool in Wengen this last August. There’s another great playground with a large cow slide at the top of the lift out of Wengen and a kid’s “cow trail” hike down hill toward Grindelwald. In Grindelwald there’s a tram up to a toboggan run and zip lines. Needless to say, they had a wonderful time.

Early to mid Sept would be much better weather…traveled here many times.

After visiting BO in late October, I;d have a hard time going at any other time--less crowds, fine weather. At least in Murren, there was plenty open and adequate lifts everywhere.

I'm assuming your option for October is based on a fall break for school. There will definitely be less crowds, as July/August these days is NUTS. Most things don't close down until late October/early November, so you should be fine with those dates. The weather is very hard to predict. We had amazing weather this July & August and then some pretty horrible weather the first 3/4 of September and then it got nice again in October, but you never really know. There could be snow on some mountain trails by then or it could be totally dry - it's impossible to predict.