Will New York see a white Christmas this year? Here's what to expect
It need not snow Dec. 25 to fit the Weather Service's definition of a white Christmas: There just needs to be at least one inch of snow on the ground. A trace amount of snow also does not count. On average, about 38% of the Lower 48 has an inch of snow on the ground on Christmas Day, according to 21 years of data compiled by NOAA.