Most accurate data and easiest setup ever!
yr.no is well known for the accuracy of their weather data because they get it from actual weather stations around the world via met.no (Norwegian Meteorological Institute) instead of the estimated weather reports that many providers offer.
Thus this plugin supports every little location I threw at it from all over the world! Setup is a breeze and takes about 2 min! Perfect if you don't need all the bells and whistles but just want accurate weather reports!