January in Yakima is the rainiest and the cloudiest month of the year. In January, the weather in Yakima is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Yakima has 13 cloudy, 9 partly cloudy, 6 sunny, and 3 rainy days in January. The rains are usually light. January as well as February, November, and December is considered the most uncomfortable time to visit Yakima.