April in Spokane Valley is the rainiest and the windiest month of the year. In April, the weather in Spokane Valley is typically warm. Average daily high temperature in April is about 14 degrees above zero. On average, Spokane Valley has 12 rainy, 10 sunny, 7 partly cloudy, and 1 cloudy day in April. The rains are usually moderate. April as well as January, February, March, and November is considered the most uncomfortable time to visit Spokane Valley.