I've been in email with panamapat about this, and already emailed him about it. For the record, I thought I'd post it here, regarding the new Vantage Vue.
From
http://www.ambientweather.com/dain62vavuew.htmlEnd of the 3rd paragraph down:
"Vantage Vue also boasts the innovative Weather Center button that displays additional data on weather variables for today and over the last 25 days."
So, it looks like the VV will show some data from the last 25 days.
OTOH, what a silly number. Why not make it 31 and cover the longest months?