Badge: the forecast for your place
A picture of the week ahead for one town or county. One line of code puts it in a blog post, a sidebar or a footer, and from then on it keeps itself up to date: you and your readers always see the current week, not a snapshot of the day it went up.
Place
Type two letters of the name
How it updates
By itself. We redraw the picture, and the date it was computed for is printed on it — so a fresh one is told apart from a copy somebody's cache is holding back.
What we ask
Keep the link under the picture — that is the price. And do not present the badge as a mark of approval: it speaks about the woods, not about the site it hangs on. Everything else is fine, and you need not ask.