November in Llanelli is the cloudiest month of the year. In November, the weather in Llanelli is typically warm. Average daily high temperature in November is about 10 degrees above zero. On average, Llanelli has 20 rainy, 5 cloudy, 3 sunny, and 2 partly cloudy days in November. The rains are usually heavy. November as well as January, February, March, and May is considered the most uncomfortable time to visit Llanelli.