I installed my Rachio on 6/18. After setting up all of the zones and giving it a weather station about 3 miles away, it scheduled my first watering for 6/28. I thought that seemed odd. The forecast did call for rain for the next few days and it turns out we did get quite a bit of rain over those days, so I chalked it up to the Rachio being a good weatherman. Long story short, the sprinklers ran for the first time this morning (7/16). We have had a very wet summer so it's made some sense that it hasn't ran and the grass has looked great, so it is no problem. However, the sprinkler hasn't reported any rain delays during this time. This morning, it ran 5 of my 6 zones (skipping the flower bed) for 5 cycles each. This is in spite of the fact that we got a decent shower yesterday evening (though they were scattered showers and the weather station may not have gotten any).
Again, it hasn't been a problem as we have gotten a lot of rain this summer, but I would have expected to see it reporting rain delays regularly during this time.
Am I doing anything wrong? Is this something that should even out as the sprinkler controller gathers more info?