To sign snow, your fingers flutter down as if they were snow flakes drifting down from the sky. Take both hands and extend and spread your fingers. Start high and bring the hands slowly down while fluttering your fingers up and down.
The sign for snow is similar to the sign for rain, the only difference being the fluttering of the fingers.
Babies tend to be very curious about snow when they first see it. Take them to the window and show them what is going on outside, then make the snow sign.
We use snow in the winter, or when showing our babies videos or pictures of snow. If you happen to live in a place with no snow, you can teach your baby by using story books about winter.