In general, the temperatures are hot during the day with some clouds that are a good relief from the hot sun. At night a light sweater is recommended. As you can see by the table below, December and January are the coldest months, and August is the hottest month. There is a very slight difference in the temperature from season to season. There is no real rainy season in the DR, it can rain at any time during the year. Much of the time the rain occurs overnight or as a brief afternoon shower. The water temperature is around 23ºC average all year long.