You will recall that hydrothermal vents are plumes of hot water that spew from rocks and cracks along the ocean floor, especially in
regions of sea - floor spreading,
such as
oceanic ridges and rift valleys.
One might think that more precipitation would then lead to more snowfall in
regions such as the Sierra Nevada, which gets air masses saturated with
oceanic moisture, but with the increasing temperatures at altitude, the precipitation is as rain, or if as snow, doesn't last as long.