August in Lord Howe Island is the coldest month of the year. In August, the weather in Lord Howe Island is typically warm. Average daily high temperature in August is about 17 degrees above zero. On average, Lord Howe Island has 13 rainy, 10 partly cloudy, and 8 sunny days in August. The rains are usually heavy. August as well as May, June, and July is considered the most uncomfortable time to visit Lord Howe Island.