A season is marked by changes in weather, ecology and hours of daylight. Seasons result from the yearly orbit of the Earth around the Sun and the tilt of the Earth's rotational axis relative to the plane of the orbit.
In temperate and polar regions, the seasons (spring, summer, fall and winter) are marked by that reaches the Earth's surface.
During May, June, and July, the northern hemisphere is exposed to more direct sunlight because .
The same is true of the southern hemisphere in November, December, and January. The tilt of the Earth causes the Sun to be higher in the sky and lower in the sky during the winter.