December begins the dry season in the Northern Mariana Islands, with the average temperatures in the 74°F (23.3°C) to 81°F (27.2°C) range. The atmosphere cools down a little, but there is hardly a winter season on the islands. Sunny days are common, and the 11-hour days receive more than 5 hours of bright sunlight. The humidity is on the wane, along with the rain, which registers a moderate 5.9" (150mm) in the month. Christmas and the arrival of the New Year see a rise in tourist footprint, mainly from Asia and North America. Seawater temperatures rise above 82°F (27.8°C), and the calm waters see a renewed interest in snorkeling and scuba diving. Carry a scarf, hat, and rain jacket for the probability of an all-weather scenario during the transition to the dry season. Keep an eye on the weather for storms that arrive at the end of the season. The mild weather in the Northern Mariana Islands in December is a precursor for the pleasant season ahead.