August in Weligama is the rainiest, the cloudiest, and the coldest month of the year. In August, the weather in Weligama is typically warm. Average daily high temperature in August is about 27 degrees above zero. On average, Weligama has 30 rainy and 1 sunny day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Weligama.