October in Gatchina is the rainiest month of the year. In October, the weather in Gatchina is typically cold. Average daily high temperature in October is about 6 degrees above zero. On average, Gatchina has 21 rainy, 8 cloudy, and 2 sunny days in October. The rains are usually moderate. October as well as March, April, and November is considered the most uncomfortable time to visit Gatchina.