BS.
I call BS because I live here. This summer was pretty mild and winter was quite normal. Back in the nineties we had the hottest summers I have experienced anywhere in the USA and warm winters with them.
Remember this would be According to the Same CENTER of City record measurement/recording locations (for any long ‘historic’ data that’s where those numbers would HAVE to come from).
AND THAT IS WHERE there is more Concrete and Asphalt than ever before in History... Heat trapped by manmade structures, it would be VERY strange for the temperature to NOT be higher at those locations now.
A more generalized sampling likely shows something very different.
As usual these published claims all need to have references to the data involved in the determination — including WHERE ALL the data was collected and HOW it was chosen and analysed.
Destruction/changes to the swamplands in Florida also kinda skew the ‘historic’ data more than a little.