Why is it cold in the Winter and Hot in the summer

Imagine a line running through the center of Earth from the north pole to the south pole. Earth rotates around this line  (its axis). Because Earths' Axis is tilted 23.5 degrees, either the Northern or Southern Hemisphere points toward the sun in June, July, and August, the Southern Hemisphere points away. In December, January, and February, these positions are reversed Australia has its summer during North America's winter. Tilting away from the Sun in winter means that the light because it is spread out over more area.