Snow scenes are full of bright white color. Your camera will see this and will try to turn all the pure white into grey, leaving the resulting photo looking like a portrait of dirty snow. So, you have to trick your camera in order to take an accurate image of the snowy scene. Lower your ISO to 50 or 100, and open your lens up one or two f-stops more than the auto setting suggests. For example, on a bright and sunny day in the snow, set your camera to 1/1000 of a second shutter speed, f/8 aperture, and ISO at 50 or 100. Use the same settings for an overcast day, though the resulting photo will not be as bright because there is less available light. When shooting snow scenes at night, increase your shutter speed to about 5 seconds, and close down the lens to ISO 200 or 400. Set up a tripod, and use the self timer so you don’t cause a blur when you push the button to take the photo. Adjust the shutter speed to make the photo lighter or darker (increase it for lighter photos; decrease it for darker photos).