@fennsen Very interesting. How often are you updating the watering results for OpenSprinkler? I think the ‘floating’ updates of the official OWM weather adjustments cause the problem that there are water% variations during the day.
@samer It is maybe worth to think about updating the water% only once per day, e.g. at midnight or before sunrise and only change it during the day in case of rain occurence or rain forecasts?