Just being close to the equator isn't the only reason that some parts of the world are hotter or colder than others. There are many factors that have an impact on the temperature range in locations around the world, some more obvious than others.
For example, being around large bodies of water, like oceans, drastically reduces the temperature of a location that is just as close to the equator that has no bodies of water at all. This is why in the middle of the United States, temperatures rise much higher than those of the states near the coast.
Moreover, elevation has something to do with temperature. If you're closer to sea level, air is more dense can hold more heat, while being higher up means that air is much thinner and much more efficient at evacuating heat.
It's also well known that the way the Earth tilts on its axis has a lot to do with the heat. The changing the seasons is less noticeable the closer to the equator that you get, while the opposite happens for those far north or far south; they notice huge changes in weather throughout the year.
If you ever wondered why the weatherman simply can't ever get the weather right, it's because there are just so man factors to take into consideration.