Day Length Affects Temperature
Another important factor that has a direct impact on the heating of the Earth is the length of a day. The longer that a day lasts, the more time that there is for Earth to absorb energy from the Sun. Thus, longer days typically result in warmer days, while shorter days result in cooler days.
On the equator, the length of days changes very little throughout the year. Daylight shines for almost exactly 12 hours, and darkness reigns for almost exactly 12 hours. The further away that one travels from the equator, however, the more variation in length of day that will be observed.
In the summer days stretch out, becoming much longer than the nights, while the opposite is true in the winter, when night lasts longer than day.