March in Spokane is the rainiest month of the year. In March, the weather in Spokane is typically cold. Average daily high temperature in March is about 7 degrees above zero. On average, Spokane has 22 rainy, 6 cloudy, and 3 sunny days in March. The rains are usually heavy. March as well as January, February, April, and November is considered the most uncomfortable time to visit Spokane.