In October, the weather in Barnaul is typically cold. Average daily high temperature in October is about 8 degrees above zero. On average, Barnaul has 9 cloudy, 7 rainy, 7 sunny, 7 partly cloudy, and 1 snowy day in October. The rains are usually light. October as well as January, February, and December is considered the most uncomfortable time to visit Barnaul.