I climbed Mt. Adams on June 10, 2019. I left the trailhead at 2:30 in the morning. Only the first half mile of the trail was snow-free. The remainder was firm snow in the early morning hours. I arrived on the summit at about 10:00 am. The hike up was about seven and a half hours and about three and three-quarters back.
The weather was perfect, and the snow was nicely firm on the ascent. The descent was soft enough to glissade down at many points.
The snow got soft enough for skiers around 11:00am to carve turns from the summit without being icy.