That depends on your latitude. The higher your latitude, the less sunlight you get during winter. (And the more sunlight you get during summer!) Over the course of a year, it all averages out; you...
The northernmost part of Alaska is above the arctic circle and will experience several weeks of darkness with no sunrise. The rest of the state experiences days with short periods of daylight.
There are fewer hours of sunlight during the winter because of were the Sun is situated. The sunlight cannot be distributed evenly everywhere at all times because of the Earth's shape, how it spins...
June is when the Northern Hemisphere is tilted the furthest toward the sun. If you can imagine the Earth, a sphere, rotating as the "top" half is tilted in the direction of the sun, you might notice...