October in Sapporo is the sunniest month of the year. In October, the weather in Sapporo is typically warm. Average daily high temperature in October is about 12 degrees above zero. On average, Sapporo has 16 rainy, 9 sunny, 4 cloudy, and 2 partly cloudy days in October. The rains are usually heavy. October as well as March, April, May, and July is considered the most uncomfortable time to visit Sapporo.