The main problem is that I really don't care about the maps. It's 78 in Jacksonville, apparently, but I live in New York. I will very, very, very rarely care about the weather in Jacksonville.
Forecast.io quickly tells me, without scrolling, what the weather will be for the next hour, the next day, and the next seven days. That matters. It does it with a quick, easy to parse hierarchy - all in a column, same sizes for elements, left-aligned. It does have the globe map, but I mostly consider that a visual accent. It's a rain map though, which is at least more useful than a temperature map (rain tends to move in a certain direction).
While darksky.net has this information, it's not as easy to follow. It's center-aligned, which is harder to read, and the different fonts don't have a clear role. It goes now -> day -> hour -> (ad for an app I've already downloaded) -> (giant map) -> week, instead of now -> hour -> day -> week, so the scope jumps around instead of increasing with each step.