“If the snow temperature is below approximately -10 degrees C, the downward pressure of your footstep can cause some of the bonds between snow grains to snap or some of the layers or snow to suddenly yield and then slide over one another. Either action causes brief oscillations of the snow, which produce sound. If the snow is not as cold, the snow grains give too easily to snap or suddenly yield, because the bonds may be fewer or weaker than when the snow is very cold. The weakness could be due to partial melting, which lubricates any sliding. The melting might also be due to absorbed sunlight. Or perhaps at some points the pressure you apply is enough to melt the snow.”

I googled about snow squeaking and arrived here. I had heard years ago that the frequency of the squeak of snow varies with snow temperature. Have you any comment on this? As I live in the UK I do not have much opportunity to test this as we don’t have much variation in temperature of snow here.