October in Onega is the windiest month of the year. In October, the weather in Onega is typically cold. Average daily high temperature in October is about 5 degrees above zero. On average, Onega has 14 rainy, 8 cloudy, 6 partly cloudy, 2 sunny, and 1 snowy day in October. The rains are usually heavy. October as well as May and September is considered the most uncomfortable time to visit Onega.