It always becomes foggy when winter comes into our area and it reminds me of those old days.

Because ourmy hometown is located in the northern part of China, it is very cold during the winter days.

All the trees have fallendropped their leaves, all the crops have been harvested, and there is a sense of depression in the air.

Or: "All the leaves have fallen from the trees, all the crops have been harvested, and there is a sense of depression hanging heavy in the air.

The next morning, there isare a lot of long ice inicles hanging from the rafters.

You can’t even reach out your hands and people seem to all lose their energy.

Correct, but more natural would be: You can't even lift your hand, and everyone seems to have lost their energy.

The whole winter has passed withs in a fog of depression.

or: "a dark cloud of depression"

This is what the weather in the wintinter weather is like in our area

Or: "This is what the winter is like in our area"