I always have a tab open with merrysky. I really like the extra detail they show in the graph of wind/temp/precipitation and the break down of the day.

For Seattle area in particular most weather apps will show the entire week as cloudy and rainy, but there is a lot more to it and merrysky is able to surface that.

Best I've found as well. The dev was also very kinda and responsive about fixing a (minor) graphical bug I reported.