In January, the weather in Walla Walla is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Walla Walla has 11 cloudy, 10 rainy, 5 sunny, and 5 partly cloudy days in January. The rains are usually light. January as well as February, March, November, and December is considered the most uncomfortable time to visit Walla Walla.