[chadgeidel]

That line was a lot lower than I imagined! Surprised that Denver is “too far north”.

[jessaustin]

It is silly to go through the trouble of including a map, only to reinforce the imprecision of the parallel approximation. Obviously People in Denver get more sunlight than e.g. people in Nashville, given the altitude and weather patterns. More detailed maps don't limit themselves to drawing a straight line.