October in Willemstad is the cloudiest month of the year. In October, the weather in Willemstad is typically hot. Average daily high temperature in October is about 28 degrees above zero. On average, Willemstad has 23 rainy, 4 cloudy, 3 partly cloudy, and 1 sunny day in October. The rains are usually heavy. October as well as January, September, November, and December is considered the most uncomfortable time to visit Willemstad.