I just had to abort my JMT thru-hike due to a stress fracture in my left ankle. However, up to 11K, there was NO snow on the trail between Yosemite Valley and Red's Meadow. The word from north-bound PCT'ers is that there is no appreciable snow on the entire High Sierra corridor from Whitney to Vermillion Valley Resort. What little there was a couple of weeks ago (patches you could walk across easily) are likely gone by now.
Mosquitoes were a nuisance despite the scarcity of snow, but not a terror.
However, be VERY aware of wildfire concerns. There were 4 separate fires in the Inyo National Forest when I got off the trail. It seems like the eastern California corridor is a huge patchwork of flames and dry lightning storms are only making things worse. Be informed and be careful.