Weather and Latitude are not allies

The north is cold, the south is warm, right?  Wrong.  It's not that simple...even in the northern hemisphere.

There is a popular assumption that if you move to higher latitudes (toward the poles) you can escape the heat, and that by moving to lower latitudes (toward the equator) you can escape the cold. 

The equation is simple.  But is it real?  If it was, then the most northerly capital, Reykjav