Jack had the ability to summon snow, ice, frost, and bolts of ice. However, throughout most of his times as Jack Frost, Jack learned that he could control his own power over magic.

Jack can conjure ice, snow, and frost from his mere presence, as well as freezing winds, snowballs, snowflakes, etc. Jack can even manifest

from frosted window panes, freeze water by walking on it, and conjure indoor snowfall, and of course, being the spirit of winter, he is not bothered by the cold.