Climate skip doesn't necessarily use precipitation in determining whether to skip or not.
If the vegetation type in the schedule has been determined that it can make it to the next watering we will skip the schedule. Largely dependent on the root zone depth of the plants.
I know this article talks heavily about precipitation (which it shouldn't), but if your evapotranspiration is very low from day-to-day, we might assume that you can make it to the next watering cycle. For new plants this feature probably should not be enabled until they are well established.
Let me know if you have further questions after checking out the above.