@mclancy - That's not how Climate Skip works. As @mckynzee stated this was a Rain Skip event.
Here's the difference:
Rain Skip - checks one hour before the schedule run time and sees if either of these conditions are true: a) actual rain within the past 24 hours is greater than the skip amount or b) forecasted rain for the next/future 24 hours is greater than the skip amount. If at least one of those conditions is true, then Rachio will perform a Rain Skip. Yes, the forecasted/future rain may not occur.
Climate Skip - an example would be that two days ago it rained enough to fill up the field capacity, and the ET since the rain and the ET forward until the next scheduled watering won't bring the ground moisture below the allowed depletion level Rachio will perform a Climate Skip. Climate Skip looks backwards and forwards for seven days (I believe in Fixed schedules), compared to one day for Rain Skip.