Answer:
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
I am all around you, but you cannot see me. I have no throat, but you can hear me. Valued during summer but despised in the winter. What am I?
I cannot be burned in fire or drowned in water. What am I?
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak, but seldom the bold. What am I?
I can be entertaining until you realize some pieces have been lost.
They come to witness the night without being called, a sailor's guide and a poet's tears. They are lost to the sight each day without the hand of a thief.