Welcome to MySwissAlps! Jungfraujoch is covered in snow all year round. Mid September is as good as any other time, as long as the weather of the day is fine. You need clear skies to enjoy the views. More information can be found on myswissalps.com/ jungfraujoch.
All you need to know about traveling by train, bus or car in Switzerland.
Hand picked Swiss hotels and other accommodations are right here.