October in Ust-Kamchatsk is the sunniest month of the year. In October, the weather in Ust-Kamchatsk is typically cold. Average daily high temperature in October is about 4 degrees above zero. On average, Ust-Kamchatsk has 11 rainy, 9 sunny, 9 partly cloudy, and 2 cloudy days in October. The rains are usually heavy. October as well as January, February, May, and September is considered the most uncomfortable time to visit Ust-Kamchatsk.