January in Honiara is the rainiest and the cloudiest month of the year. In January, the weather in Honiara is typically warm. Average daily high temperature in January is about 26 degrees above zero. On average, Honiara has 30 rainy and 1 sunny day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Honiara.