No, your snow pants inseam should actually be a bit longer than what you wear in everyday pants. When you're skiing or riding, your knees are constantly bent, which pulls the pant legs up. Plus, sitting on a cold chairlift with pants that are too short means exposed skin at your ankles — not fun.
A good rule of thumb is that your snow pants should reach about the middle of your boot when you're standing straight. This gives you enough length to stay covered in a flexed riding position without excess fabric dragging on the ground. Too long and you'll be stepping on your cuffs or getting them caught under your boots.
Many brands offer short, regular, and long inseam options, so don't just settle for whatever's on the rack. If you're shopping online, measure your current snow pants or check the brand's size chart carefully — ignoring inseam is one of the most common mistakes people make when buying snow pants online.