When it was first installed, it skipped watering when it rained almost flawlessly (or as flawless as a weather forecast can be). Then, I decided to use a local “backyard” weather station instead. That didn’t work so well, so I switched it back to the aggregated weather forecast (same as it was when it worked) and, now, it seems oblivious to rainfall. I can see it clearly in the forecast IN THE APP. Last time it rained, it was well over the threshold (I was starting to build an Ark, just in case).
I don’t know if this makes a difference (it shouldn’t), but I turned off notifications because THEY WERE COMING IN AT 3:00 a.m.