Dark Sky almost always over predicted rain for my area. I think that was kind of their strategy. That said, I very much miss Dark Sky on android.

Also I really like a tool called Forecast Advisor. https://www.forecastadvisor.com/ . It shows you the accuracy of various forecasting services for your area.

I use it whenever I travel. I don't stick with one forecast site because depending on the terrain/location their accuracy changes drastically.

Certain models are better for certain geographical features depending on the location. I tend to hangout around a lot of mountains and the difference in forecast models makes a huge difference.