February in Willemstad is the coldest month of the year. In February, the weather in Willemstad is typically warm. Average daily high temperature in February is about 26 degrees above zero. On average, Willemstad has 14 sunny, 10 partly cloudy, and 5 rainy days in February. The rains are usually light. February as well as March, April, and May is considered the most comfortable time to visit Willemstad.