New version updated (v6.5) with an optional 12 hour temperature graph as the widget background. I've tried to make it subtle enough that it doesn't get in the way of other data on the widget but not too subtle that you can't see it.
Note with this background image option set, it downloads the clientrawextra.txt file on every update. Mine is about 3k. Theoretically the updates might drain the device battery more with this background set.
I've also made the free version a full featured 24 hour demo.
Let me know if you have any feedback. Can't promise to act on it though, but I'll do my best, particularly if there are bugs.