Summer.

Winter is just cold and darker. Days are shorter and it's better to be inside.

Winter kind of sucks, but it's easier to stay warm in the winter than it is to stay cool in the summer.

Winter brings snow too though, and snow slows everything down. And forget about walking and driving through the it.

Freshly fallen snow looks wonderful though and again, it's easier staying warm. Layering up...?

It's close but I give my vote to ... summer.