I would prefer to use a Personal Weather Station (PWS) in my neighborhood, since the nearest NWS stations are in a rain shadow and receive significantly less rainfall than I do. I originally chose a PWS that appeared to give reliable data over several months’ time.
Everything was fine, until one day I discovered that watering was occurring during heavy, sustained rainfall. It turned out that the PWS had gone offline and had not reported for several days. Rachio apparently interpreted this as “no rainfall” and decided that watering needed to be done.
I suggest that there should be a way to specify a backup weather station that is to be used in case the primary one stops reporting.
Since a normally operating PWS reports at least once per hour, I suggest that the timeout for missing reports should be relatively brief – say, 6 hours – so as to minimize the likelihood that significant precipitation events are missed.
Of course, when this happens, Rachio should send (and log) a notification so that the owner will know that the chosen PWS is no longer reporting.