I'm wondering if support can reproduce what might possibly be a bug on Rachio's end. I live in inland Los Angeles and there are a few major airport weather stations around within a 10 mile radius. I previously used the KVNY and KBUR airport weather stations, but I've been experimenting with others that seem more accurate to my hyperlocal climate. As of this writing the weather stations do not appear to be offline. The last time KVNY and KBUR reported updated weather data was 4 and 2 minutes respectively.
When I attempt to change weather stations, the only one that's available to me is one in Sandberg, CA which is 40 miles away from me and basically in the middle of nowhere near a mountain microclimate. I've experienced this bug a few times. If I just wait a few hours, I'm able to see a list of national weather stations near me (but not all, and sometimes they randomly appear and disappear - like KLAX)
Tried refreshing, and logging on/off both web and mobile app. Toggle and then untoggling "show personal weather stations" also did not help. My zip code and geolocation coordinates did not change. GPS is functional - when I toggle show personal weather stations, it displays personal weather stations in my area. I'm on Android 6 for mobile/ Chrome 54.0.2840.59 for web app.