So a month in with the Rachio and in general I'm enjoying it. I've been wondering why I've had to set manual rain delays though. I thought this system was smart enough to look at the weather going forward and water or not water based on that. The system wanted to water 1" on a Thursday when we were going to get 2"+ on Saturday / Sunday.
After looking at my data, it's pretty clear the local airport isn't measuring precipitation correctly. That weekend of 2'+, it registered 0.1" of rain. Changing from that airport to the next one (Dulles) and from 8mi to 13mi away, I now am pulling in reasonable rain information. My calendar has updated to a more reasonable, less often time-frame and the details show foretasted rain much more reasonable.
It'd be nice to have a reliability rating for weather stations. Both the "official" and the PWS ones. Eventually I'd like my own PWS but I don't have a good place to put it (and wallet needs some recovery). But I think it would be a good resource to know what everyone else thinks of a particular weather station.