My system emailed me today for the first time with this new feature. Thanks Rachio team;
Hi Mr Perfect (OK, I made that up),
Based on current weather conditions for device Front_Home yard the next scheduled water time at 04:00 AM will be skipped.
The weather service in your area has predicted 0.76 inches of precipitation over a 48 hour period. The current threshold used to determine rain delay is 0.25 inches of precipitation.
If you would like to turn off this rain delay, you may do so from your Rachio smartphone app.
The Rachio Team