Understanding what NOAA's hottest US June on record really means ( they ignore the actual record in 1933, and then show warmer nights, not warmer days )

June US Average Mean Temperature:

June US Average Maximum Temperatures:

June US Percentage of Days 

above 95 degrees F. :

June US Percentage of Days 

above 90 degrees F. :

June US Average Minimum Temperatures

(all the warming is here):