Is there a way for them to put this on?
This is a good question! I did search the Amazon Skills store for “dew point” and only found one option called “Weather Hat” – but, based on the reviews, it didn’t look like it provided the dew point information you (and several others!) were looking for.
I would suggest reaching out to some of the Weather skill makers, like The Weather Channel, and ask them if they have any plans to include dew point in the future!
Hope that helps.