January in Denia is the windiest and the cloudiest month of the year. In January, the weather in Denia is typically warm. Average daily high temperature in January is about 13 degrees above zero. On average, Denia has 16 sunny, 12 partly cloudy, and 3 rainy days in January. The rains are usually moderate. January as well as February and December is considered the most uncomfortable time to visit Denia.