Its about relative to how dew points have been looked at over time and compared. And in the larger meteorological context of model data and observations. Will has explained this to you numerous times each summer lol.
Yes, your backyard dew has always been higher even when you didn’t know it. When you used to start to feel it get a little humid 10-20 years ago and you turned on TWC to watch the “Local on the 8s”, you’d see an airport showing 61F for a Td. Oh right, makes sense, they say anything over 60F starts to feel humid, it says 61F.
The whole time you were doing that your backyard was probably 65-66F but you just didn’t know it.
So when the local news pops this graphic up, as they have for decades, it is based on the ASOS system.
They should make a new one up for your home stations but just add 5F to each level. Comfortable on a home station is up to 65F, or ASOS of 60F, etc.