Canadian Weather focast

I would like to know what is the source of the focast that Rachio uses for Ontario Canada. Right now every other focast shows 100% rain and i can see the rain falling, but rachio forecast shows 17% and my sprinklers are on. I even have my own Atlas weather station which it is linked to and the sprinklers still came on. I suspect Rachio uses a random focast generator, because I’ve never seen their forcast ever come close to Environment Canada, Weather Network or Weather Underground… most disappointing