Earth is about 93 million miles away from the sun. Its temperature is between the extremely hot Venus, and freezing cold Mars. It's average global temperature is 59 degrees Fahrenheit, whereas Venus has an average global temperature of 890.6 degrees Fahrenheit, but Mars' average global temperature is -255 degrees Fahrenheit.
The earth's axis is slightly tilted. Because of this tilt, the sun’s rays hit regions near the North and South hemisphere indirectly. This phenomenon causes the two hemispheres to experience the seasons at different times. When the North Pole has winter, the South Pole has summer, and vice versa. The equator is in direct sunlight all year, which means it is hotter than any other place in the world. The average temperature at the equator is 86 degrees Fahrenheit.
North America is located in the Northern hemisphere. It receives the longest amount of sunlight during the summer solstice on June 21st. It that receives the smallest amount of sunlight on December 21st, which is referred to the winter solstice.
Not all countries have their solstices on the same day. Some countries in the southern hemisphere, like Australia have exactly the opposite; they receive the most sunlight on December 21st and the least on June 21st. The equinoxes for both hemispheres happens on September 21st and March 21st. On both of these days everywhere in the world receives the same amount of day light as night time.
If you think it is too hot on this planet, just imagine living on Venus!
[Source: Scholastic Atlas of Weather]