September in Granada is the rainiest and the cloudiest month of the year. In September, the weather in Granada is typically hot. Average daily high temperature in September is about 30 degrees above zero. On average, Granada has 27 rainy, 2 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as May, June, July, and August is considered the most uncomfortable time to visit Granada.