The featured chart presents the percentage of NWS (CLI)mate reporting sites over the continental US reporting an above or below average daily high temperature since the first of June. The warmer than average conditions have dominated this summer with only a brief few days in mid June having more than 50% of sites below average. The major caveat to this plot is that stations are biased to the eastern half of the CONUS, so you can't simply take the shown number as a spatial coverage. The numbers since the first of July are even more lopsided with warmer than average sites outpacing cooler sites by 2 to 1.

Voting:
Good = 12
Bad = 1