The rarity of Helm of the Weathered Storm is Rare. At this moment the item is available for trade.
Helm of the Weathered Storm is a skin for Tusk. The skin was added to the game on November 29, 2017, it was created by Dr. Robo.
Helm of the Weathered Storm is currently one of the most popular skins, but it is rarely seen in the game due to its high price.