Jul 1, 2018 - 4:00 PM
in reply to Dizzy1021
Hi Dizzy1021 and welcome to MySwissAlps!
Jungfraujoch, today had a high of 8 degrees Celsius. The towns down in the valley below, like Wengen had a high of 27 degrees.
They say you lose 1 degree for every 100 meters you climb so that makes about sense. Wengen is 1300 meters almost and Jungfraujoch is almost 3400 meters (2100 meters difference and 19 degree difference).
I'd expect in July for the temperatures to be around 10 degrees Celsius. perhaps 2-3 degrees as a low and 15 or so as a high.
Certainly, anything is possible though! Always tricky to plan for mountain trips - best to pack layers to be prepared for different weather