Your numbers may differ somewhat from those given below, but you should reach the same conclusions.


It is generally colder in Canada than it is in Mexico.  The north-south temperature gradient is most pronounced in the winter.

Oceans cool more slowly than land in the winter.  Water has a higher specific heat than soil so more energy must be removed from water.  Also as soon as the surface waters cool they can sink and be replaced by warmer water.

Winds blow from west to east at middle latitudes.  The greatest moderating effect from the oceans is felt along the west coast.  The east coast feels the effect of ocean to the east but westerly winds bring in cold air from the interior.


Again the greatest moderating effect of the oceans (cool summers) is found along the west coast.  Note the hottest temperatures on this map are found in the desert SW of the US.  It begins to cool somewhat as you move south toward the equator.


The annual range of temperature would be even smaller at the equator.  Sometimes just a degree or two on islands in the middle of the ocean near the equator.