I don’t believe my timer has ever adjusted correctly for rainfall amounts. It is providing a rain delay when forecasted, but I’ve never seen a “rainfall” amount greater than zero in any of the calculations. I got a lot of rain last week, and although it delayed, it began watering right away as soon as the delay was over. It appears the Aeris data is the culprit, as I’ve looked at the history and it is not even close to accurate compared to the NOAA history. NOAA shows 1.38″ for the closest airport and 1.03″ for the city station last week, WUnderground shows .99″, while Aeris shows 0.03″ using my zip code. Definitely need the ability to change the weather data provider.