Where I live it's humid, but can get pretty cold winters (coldest is -10C)
I only have to worry about hawks, I've never encountered any other predators around my area except for some housecats.
Great! Not very cold to a chicken! That’s only 14F. Cold, but not terrible. But, as already mentioned, cold and wet is not good. So, ventilation is good. Just make it so drafts are not at roost area where they sleep. Shade in the summer.
We elevated our coop 2.5 ft above ground, and we can walk all around it, although it’s tight next to the barn. So the elevation provides shade in summer. We grow vining things up the south fence for extra shade (birdhouse gourds have provided best shade of everything we’ve tried).
Our coop is walk-in for ease of maintanance , so we have a few stairs up to a deck. The deck extends several feet to the side, so we can push the wheelbarrow right up to it, next to the people door for ease of cleaning. The chicken pop door is part of the human door.
Nest boxes are stacked two high, with the lowest boxes floor level. Therefore, with the elevated coop, we open the doors on the back of the nest boxes and the nest are right at arm and shoulder height.
We keep the upper ventilation open nearly always, although we fo have covers if needed. These upper vents are well protected by the roof that extends several feet in either direction. However during the extended extreme cold and high wind event just before Christmas, we had a significant amount of snow in the actual coop!! So, we should have covered the vents. Some people use furnace vents or similar material to minimize the wind when needed in a pinch, just keep the chickens from accessing ANY material they can pick apart or destroy, because they will.
from Central NC.
