September in Yaiza is the warmest month of the year. In September, the weather in Yaiza is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, Yaiza has 27 sunny, 2 partly cloudy, and 1 rainy day in September. The rains are usually light. September as well as June, July, August, and October is considered the most comfortable time to visit Yaiza.