In October, the weather in Uusikaupunki is typically cold. Average daily high temperature in October is about 8 degrees above zero. On average, Uusikaupunki has 12 rainy, 7 sunny, 7 cloudy, and 5 partly cloudy days in October. The rains are usually moderate. October as well as March, November, and December is considered the most uncomfortable time to visit Uusikaupunki.