Based on that it appears a bit cooler than normal during the day and a light jacket at night.
Starting off a morning with temps in the upper 50's and low 60's is not unusual. It can get cool up in the mountains in the evenings too.
Last time I was there was in July about 3 years ago. I was running behind in my planned route because of a tire valve issue and hit the top of the mountain on 441 back toward Cherokee right at sundown. Had me wishing I'd taken my chaps with me in about 45 minutes
I take my leathers. I can take the liner out of the jacket when it's not too cool