Ah, seems like pwsweather is having issues with weekly graphs, it is not a huge issue since Rachio (or any other service) doesn't use those in any way. I (and everyone else) seems to be effected as well by this display glitch, but as far as I can tell Rachio is not.
Look at how the data is overflowing to the right...
Looks like monthly view is also effected (tops out on the 21st at the time this is written).
In any case, I guess we can contact them in case the issue persists.