Image caption
Map of the contiguous United States showing which of three precipitation outcomes—much wetter than average (green), average, or much drier than average (brown)—are most likely for the month of December. Darker colors mean greater chances, not how far above or below average precipitation is likely to be. White does not mean "average." It means a wet, dry, or near-average December are all equally likely. NOAA Climate.gov image, based on data from the Climate Prediction Center.