January in Yalova is the rainiest, the cloudiest, and the coldest month of the year. In January, the weather in Yalova is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Yalova has 18 rainy, 7 sunny, 5 partly cloudy, and 1 cloudy day in January. The rains are usually heavy. January as well as February and March is considered the most uncomfortable time to visit Yalova.