What season in northern hemisphere is farthest from sun?

Relative to the Southern Hemisphere we are farther away during the Winter.

The distance from the Sun is not actually what determines our seasons though. Instead it is the tilt of the Earth that matters. When tilted away either hemisphere gets fewer hours of daylight, has the light spread 'thinner' over any portion of land, and receives light through a thicker portion of atmosphere (which diffuses some of the light.)

If this sounds confusing a diagram should make it crystal clear.