September in Fort Lauderdale is the cloudiest month of the year. In September, the weather in Fort Lauderdale is typically hot. Average daily high temperature in September is about 31 degrees above zero. On average, Fort Lauderdale has 24 rainy, 3 partly cloudy, 2 cloudy, and 1 sunny day in September. The rains are usually heavy. September as well as June, July, and August is considered the most uncomfortable time to visit Fort Lauderdale.