Latitude
What is Latitude?
Difference between equator and north and south poles
Its hotter as you get closer to the equator because the sun rays are coming at a 90 degree angle. The more acute the sun ray is coming at the colder it will be. The closer to a 90 degree angle the sun rays are hitting the earth the hotter it will be.
Example
The sun ray hitting the north pole isn't near as hot as the ray hitting the equator because the ray hitting the equator is at 90 degrees
This picture describes with different seasons how the temperature changes and affects weather. As you can see the closer to the equator it is the hotter it gets.