October in Hammerfest is the rainiest month of the year. In October, the weather in Hammerfest is typically cold. Average daily high temperature in October is about 4 degrees above zero. On average, Hammerfest has 23 rainy, 4 sunny, 3 cloudy, and 1 partly cloudy day in October. The rains are usually moderate. October as well as April, May, June, and July is considered the most uncomfortable time to visit Hammerfest.