December in Agios Nikolaos is the rainiest month of the year. In December, the weather in Agios Nikolaos is typically warm. Average daily high temperature in December is about 15 degrees above zero. On average, Agios Nikolaos has 13 sunny, 9 rainy, 8 partly cloudy, and 1 cloudy day in December. The rains are usually moderate. December as well as January and February is considered the most uncomfortable time to visit Agios Nikolaos.