October in Arzamas is the rainiest month of the year. In October, the weather in Arzamas is typically cold. Average daily high temperature in October is about 6 degrees above zero. On average, Arzamas has 16 rainy, 12 cloudy, 2 sunny, and 1 partly cloudy day in October. The rains are usually moderate. October as well as January and April is considered the most uncomfortable time to visit Arzamas.