Not necessarily (tropical rainforests on the equator). It depens on how your world-axis is tilted in realtion to the plane it travels around the sun. Unfortunately my geography studies were years and years past...so that is all i got at the moment. But i am sure Hai Etlik or someone who's fit with his/her real world science will soon pop in and tell you in more detail of what i have hinted at.

Or you can go an investigate yourself. I am sure you'll find plenty of stuff if you google for axis-tilt.
As loogie hinted at, the climate depends on how the sun-rays hit the earth (what angle) in the place you want to map out. The wind-cells are also quite important (and directly related to the intensity of the sun-rays in a given area).