August in Burnie is the rainiest month of the year. In August, the weather in Burnie is typically warm. Average daily high temperature in August is about 11 degrees above zero. On average, Burnie has 16 rainy, 7 sunny, 6 partly cloudy, and 2 cloudy days in August. The rains are usually heavy. August as well as May, June, July, and September is considered the most uncomfortable time to visit Burnie.