April in Post Falls is the rainiest and the windiest month of the year. In April, the weather in Post Falls is typically warm. Average daily high temperature in April is about 14 degrees above zero. On average, Post Falls has 12 rainy, 9 sunny, 7 partly cloudy, and 2 cloudy days in April. The rains are usually moderate. April as well as January, February, March, and November is considered the most uncomfortable time to visit Post Falls.