In October, the weather in Jan Mayen is typically cold. Average daily high temperature in October is about 2 degrees above zero. On average, Jan Mayen has 15 cloudy, 8 rainy, 6 partly cloudy, 1 snowy, and 1 sunny day in October. The rains are usually heavy. October as well as June, July, August, and September is considered the most uncomfortable time to visit Jan Mayen.