September in Raymondville is the rainiest month of the year. In September, the weather in Raymondville is typically hot. Average daily high temperature in September is about 31 degrees above zero. On average, Raymondville has 15 rainy, 13 sunny, and 2 partly cloudy days in September. The rains are usually heavy. September as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most uncomfortable time to visit Raymondville.