November in St Austell is the cloudiest month of the year. In November, the weather in St Austell is typically warm. Average daily high temperature in November is about 11 degrees above zero. On average, St Austell has 23 rainy, 3 sunny, 3 cloudy, and 1 partly cloudy day in November. The rains are usually heavy. November as well as January, February, March, and July is considered the most uncomfortable time to visit St Austell.