August in Honiara is the sunniest and the coldest month of the year. In August, the weather in Honiara is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Honiara has 26 rainy and 5 sunny days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Honiara.