Even though some areas set record high temperatures for the day on Saturday, it is still pretty early for the hottest day of the year. The Weather Channel has a nice discussion of NOAA’s map of when the hottest day of the year occurs at https://weather.com/science/news/warmest-day-year-map-noaa-ncdc-20140626.
EarthSky also discusses why the solstice is not the hottest day, even though the sun is the highest in the sky. You can read it at https://earthsky.org/earth/why-isnt-the-longest-day-of-the-year-the-hottest-day.
