Three short lines, and each one adds a little more cold. The poem begins with "cold body of night," which sounds like the night itself has become a body, still and heavy. The title suggests the other body we might picture: a snowman standing out in the dark, made of nothing but frozen water.
The second line, "cold hopes of a frost," is odd and interesting. Hopes are usually warm, but here they are cold, as if even the wish for something better has been chilled. Frost is thin and fragile, so these hopes feel small and fleeting.
The last line turns inward: "the winter in my eyes." The speaker seems to have taken the season inside. The poem moves from the night outside to the speaker's own gaze, and the poem suggests a person who feels numb, lonely, or emptied out. The mood is quiet, bare, and chilly, with a hint of sadness underneath.