The Earth has an equatorial climate with a minor polar input,this
determination is made using planetary comparisons with the almost
exclusively polar climate of Uranus.

http://www.daviddarling.info/images/...gs_changes.jpg

It is customary to assert a 'no tilt/no seasons' ideology however this
has to be replaced by the actual perspective that zero inclination
reflects an equatorial climate, 90 degree inclination reflects a polar
climate with a planet's inclination falling in between these two
parameters.In the case of the Earth,its inclination is close to 80 %
equatorial with a 20 % polar input as latitudinal temperature
fluctuations at different orbital points correspond to a large
proportion of the planet experiencing mild fluctuations while a
smaller proportion experiencing large fluctuations.

Were the Earth to have an inclination similar to Uranus,the
temperature fluctuations at all latitudes would gyrate wildly between
July and January apart from a small region at the equator reflecting a
polar climate for although we accustom ourselves to the idea of
coldness with the polar regions and heat with equatorial regions,in
term of climate and planetary dynamics,the issue is far more
complicated and far more interesting.

When the Earth's climate is described as being largely equatorial then
we may move away from climate studies as part of a social/civil agenda
and back into the connection between astronomy and terrestrial
evolution where it belongs.