I can’t believe this has not already been implemented. I know Rain Bird and Irritrol (Toro) both already support this. RainMachine can do it. I’m sure there are others as well. This is not that odd of a feature. Rachio seems to be way behind in this. I just got my Rachio and it is essentially useless because of this lack of feature. In my municipality we cannot water between 6am and 6pm. Another option that would help with this situation would be the ability to run a drip station while other stations run/cycle, but that is just a Band-Aid not a solution.
I see the last post was April 2016, is there any idea of when this will be implemented? If there is no forecast for this I will probably return my rachio.