October in Saint John's is the rainiest month of the year. In October, the weather in Saint John's is typically warm. Average daily high temperature in October is about 10 degrees above zero. On average, Saint John's has 14 rainy, 7 cloudy, 5 sunny, and 5 partly cloudy days in October. The rains are usually heavy. October as well as March, April, May, and June is considered the most uncomfortable time to visit Saint John's.