As was mentiond in a previous post (http://community.rachio.com/t/local-weather-looks-a-bit-off/5180) I too can't reconcile what rachio tells me my weather is with what all other services tell me. This might be more of a support question.
However, I also suggest to add % of probability (or inches) for precipitation underneath the low temp for the day, like e.g. WU does. During summer time, this would be a good indicator to decide, if I have to think about skipping, adding etc. Over the last maybe 10 days I always had rain in the rachio windows on next day or so, but it didn't materialize. So I am a bit nervous about the basis for calculation when rachio calculates my watering needs. I know you trust aeris implicitly, but where are the differences coming from?
Below is my situation this morning for illustration. Maybe someone with more experience can help me understand what I am dealing with and how to interpret the data? Today it shows 0% precipitation, and rain tomorrow Tuesday.
If I check WU, that is what they are showing: 40% rain chance today and big rain tomorrow (in the 10 day pic)
And for the 10day forecast: