^Insert juvenile comment along with Beavis/Butthead chuckle
The coldest part of the day being right after sunrise is due to radiated heat having dropped to lows and incoming new sun radiation being less than what has escaped. Better explantion here:
https://indianapublicmedia.org/amome...me-of-the-day/
I liked the mid-west and New England summers where you would get a couple cooler days to break up the monotony of the heat. Here in San Antonio, the oven finally went on Wednesday. We'll be in mid 90s to low 100s through some time in September. Unless there is a hurricane that cools us off a bit.